YouTube 包含大量精彩内容（包括我们自己的YouTube 频道(YouTube channel)），但没有什么比不断缓冲和加载缓慢的视频更令人恼火的了！
由于在您看到自己喜欢的YouTube(YouTube)内容之前必须发生许多不同的事情，因此YouTube视频缓冲背后的罪魁祸首可能是任意数量的项目。如果您只看到那个旋转的小圆圈，请尝试以下技巧之一来解决YouTube速度变慢的问题。
运行互联网速度测试
是YouTube的问题，还是您的整个连接速度很慢？运行(Run)互联网速度测试，看看您是否获得了与YouTube服务器的足够快的连接。
更新您的应用程序或浏览器
在您执行任何其他操作之前，请更新您的浏览器或YouTube应用程序，具体取决于您使用的是哪一个。这不太可能是问题所在，但最好在一开始就从问题列表中消除软件错误或过时的软件。
因此，请更新您的Chrome(Chrome)、Firefox或您喜欢的任何浏览器副本，或查看您设备的应用商店以查看是否有可用的YouTube应用更新。
您正在使用 VPN 或代理
如果您使用的是VPN或代理服务器，则所有YouTube 视频(YouTube video)数据都会在到达您之前流经该服务。这使得数据瓶颈更有可能发生。
只需(Simply)暂时关闭您的VPN或代理，即可查看(VPN)YouTube问题是否自行解决。如果关闭VPN(VPN)后问题消失，请尝试将您的VPN更改为其他服务器。或者，如果您不关心隐藏您的YouTube活动，您可以使用拆分隧道将您的(split-tunnelling)YouTube流量从VPN中排除。
您的 ISP 正在限制 YouTube
您的Internet 服务提供商(Internet Service Provider)( ISP ) 无法看到您发送到使用HTTPS的网站的数据，但它可以知道您正在访问哪些网站以及您发送和接收的数据类型。例如，它知道您是在观看流媒体视频还是使用洪流技术(torrent technology)。
您的ISP可以选择将流量运行的连接速度降低到它喜欢的任何速率。这被许多用户称为“节流”，但正确的术语实际上是“整形”。当所有流量的整个连接变慢时，就会发生限制，但是当仅对某些类型的流量施加互联网速度限制时，它被称为整形。
通常，制定政策将包含在您与供应商的协议的细则中，但这可能会在您不知情的情况下发生。检查您的YouTube(YouTube)流量是否受到影响的最简单方法是使用VPN。除非您的ISP调整所有VPN流量（这种情况很少见），否则您应该会看到性能提升。请务必选择靠近您的物理位置
的VPN服务器以获得最佳性能。(VPN)
CDN 有问题
来自YouTube(YouTube)等网站的流媒体内容并非都来自单个中央YouTube服务器。相反，全球服务器网络称为CDN或内容交付网络(Content Delivery Network)。如果您与CDN之间的连接由于某种原因出现问题，则您的YouTube视频可能存在加载问题。
您可以通过切换到本地CDN区域之外的服务器来使用VPN来解决此问题。这是解决本地CDN临时问题的绝佳方法。但是，如果问题是长期的（或者您的 ISP 限制了那些特定的CDN(CDNs)），您可以从命令提示符向您的(Command Prompt)Windows防火墙添加规则。
- 以管理员身份
打开命令提示符。(Command Prompt)
- 输入以下命令：
netsh advfirewall 防火墙添加规则名称=”YTCDN” dir=in action=block remoteip=173.194.55.0/24,206.111.0.0/16 enable=yes
这会阻止 YouTube 的CDN(CDNs)使用的 IP 地址范围。您可以通过在命令提示符(Command Prompt)中键入以下内容来撤消此操作：
netsh advfirewall 防火墙删除规则名称=“YTCDN”
按 Enter 键(Press Enter)，该规则应被删除。您可以将规则名称更改为您喜欢的任何名称。
视频质量设置得太高
YouTube会将您的视频流质量默认设置为您的互联网连接和显示器可以处理的最佳水平。例如，如果您使用的是 1440p 屏幕，如果您的带宽允许，它将转到 1440p。至少，这就是YouTube在(YouTube)Mac、Windows或Linux上的桌面浏览器上的行为方式。
有时YouTube可能会出错，或者您可能只是手动将流的质量设置为高于您的互联网连接可以处理的质量。在这种情况下，点击Android或 iOS 应用程序中的三个点，然后点击质量(Quality)以更改为较低质量的内容。
如果您使用的是桌面浏览器，请选择播放器窗口中的齿轮图标以访问质量设置(Quality Settings)。
清除浏览器缓存
Web浏览器具有临时数据缓存，其中存储了您经常从 Web 请求的信息。通常，这会极大地加快您的浏览体验，但缓存可能会损坏或以其他方式导致问题。
您应该手动清除浏览器缓存中的数据，以确保您不会因为缓存问题而看到YouTube缓冲。(YouTube)执行此操作的确切方法因您的浏览器而异，因此请查看如何清除任何 Web 浏览器的缓存(How To Clear The Cache Of Any Web Browser)以获取详细说明。使用清晰的缓存，您至少可以将其排除为问题的原因。清除浏览器缓存不会清除浏览数据，因此您不必担心会擦除浏览历史记录。
Wi-Fi 信号问题
如果您使用的是 Wi-Fi，那么您的YouTube性能很可能会因为信号问题而变差。Wi-Fi 信号条在这里也可能具有欺骗性，因为您的信号强度可能很高，但也会受到干扰。
尝试移动到靠近路由器的位置，看看问题是否已解决。如果YouTube在您靠近路由器时有更好的加载时间，您将需要寻找增强弱 Wi-Fi 信号的(boost a weak Wi-Fi signal)方法。
更改您的 DNS 服务器
DNS或域名系统(Domain Name System)是互联网的电话簿。当您输入诸如www.YouTube.com之类的地址时，它会转到DNS服务器，该服务器将该地址转换为 IP 地址。
如果DNS速度慢或有问题，这将影响页面加载速度，甚至阻止它们首先加载。Google（拥有YouTube）的DNS服务器位于 8.8.8.8 和 8.8.4.4，因此请尝试将您的 DNS(changing your DNS)服务器更改为您的 ISP 默认提供的其他服务器。
使用下载功能
如果您是YouTube Premium 订阅者(YouTube Premium subscriber)，则可以下载YouTube视频而不是流式传输。如果您愿意等待几分钟，您可以使用此下载功能获取离线视频副本，从而确保完美播放。
您也可以使用在线 YouTube 视频下载网站(online YouTube video downloading site)，但请记住，这违反了 YouTube 的服务条款。尽管这些服务是匿名的，但没有被禁止的严重风险。
移除广告
YouTube 是一个广告特别多的网站，这些广告有可能干扰主要视频内容的播放。如果未加载前贴片广告，您可能永远无法看到想要观看的视频，并且广告可能存在缓冲问题。
您可以通过订阅YouTube Premium完全删除YouTube 上(YouTube)的广告。家庭计划(Family Plan)涵盖六个YouTube帐户，包括访问YouTube音乐。
如果您不想订阅付费服务，可以使用广告拦截软件或插件。
你不小心改变了播放速度(Playback Speed)
当大多数人搜索“ YouTube运行缓慢”时，我们假设该服务正在缓冲或滞后。但是，您的意思可能是您的YouTube视频播放缓慢！
如果发生这种情况，您可能不小心将播放速度设置为低于“正常”。(Normal.)” 如果您使用的是Google Chrome等桌面浏览器，请选择播放器窗口中的齿轮图标，选择播放(Playback)速度，然后将其更改为正常。(Normal.)
在Android(Android)或 iOS 应用程序中选择三个点并更改Playback Speed。
关于YouTube和Adobe Flash的重要说明(Adobe Flash)
在搜索有助于减缓YouTube视频加载的建议时，您会看到有关将Adobe Flash Player更新到最新版本的建议。您应该忽略与Flash(Flash)播放器有关的任何事情，因为在撰写本文时Flash已经停产多年。早在Flash退役之前，YouTube就已经转向HTML5播放器，它完全不依赖Flash。
如果您的Microsoft Windows PC上仍安装了Flash ，则需要更新Windows以将其删除或手动禁用 Flash(manually disable Flash)，因为它现在存在安全风险。
Why YouTube Is Slow on Your Device (And How to Fix)
ΥouTube is packed with great content (inсluding our own YouTube channel), but nothing is more irritating than constant buffering and slow-loading videos!
Since so many different things have to happen before you see your favorite YouTube content, the culprit behind your YouTube video buffering could be any number of items. If you’re only seeing that little spinning circle, try one of these tips to fix YouTube slow down.
Run An Internet Speed Test
Is the problem with YouTube specifically, or is your entire connection slow? Run an internet speed test to see if you’re getting a fast enough connection to the YouTube servers.
Update Your App or Browser
Before you do anything else, update your browser or the YouTube app, depending on which one you’re using. It’s not likely that this is the problem, but it’s best to eliminate software bugs or outdated software from the list of issues at the start.
So update your copy of Chrome, Firefox, or whichever browser you prefer, or check your device’s app store to see if a YouTube app update is available.
You’re Using a VPN or Proxy
If you’re using a VPN or proxy server, all YouTube video data flows through that service before getting to you. This makes it more likely that a data bottleneck could happen along the line.
Simply turn your VPN or proxy off temporarily to see if the YouTube issue resolves itself. If the problem goes away with the VPN off, try changing your VPN to a different server. Alternatively, if you don’t care about hiding your YouTube activity, you could use split-tunnelling to exempt your YouTube traffic from the VPN.
Your ISP Is Throttling YouTube
Your Internet Service Provider (ISP) can’t see what data you’re sending to a website that uses HTTPS, but it can tell which sites you’re visiting and the type of data you’re sending and receiving. For example, it knows whether you’re watching streaming video or using torrent technology.
Your ISP can choose to reduce the connection speed at which that traffic runs to whatever rate it prefers. This is referred to as “throttling” by many users, but the correct term is actually “shaping”. Throttling happens when the entire connection is slowed down for all traffic, but when internet speed limits are imposed only on some types of traffic, it’s called shaping.
Often shaping policies will be included in the fine print of your agreement with your provider, but it may happen without your express knowledge. The easiest way to check whether your YouTube traffic is shaped is by using a VPN. Unless your ISP shapes all VPN traffic (which is a rare possibility), you should see a performance improvement. Just be sure to choose a VPN server close to your physical location for the best performance.
There’s an Issue With the CDN
Streaming content from sites like YouTube doesn’t all come from a single central YouTube server. Instead, a network of servers worldwide is known as a CDN or Content Delivery Network. If the connection between you and the CDN is having problems for some reason, then your YouTube video could have loading issues.
You can use a VPN by switching to a server outside your local CDN’s region to get around this issue. This is an excellent way to resolve a temporary issue with your local CDN. However, if the problem is long-term (or your ISP throttles those specific CDNs), you can add a rule to your Windows firewall from the Command Prompt.
- Open Command Prompt as administrator.
- Enter the following command:
netsh advfirewall firewall add rule name=”YTCDN” dir=in action=block remoteip=173.194.55.0/24,206.111.0.0/16 enable=yes
This blocks the IP address ranges used by YouTube’s CDNs. You can undo this by typing the following into Command Prompt:
netsh advfirewall firewall delete rule name=”YTCDN”
Press Enter and the rule should be removed. You can change the rule name to anything you like.
Video Quality Is Set Too High
YouTube will default your video streaming quality to the best level your internet connection and display can handle. For example, if you’re using a 1440p screen, it will go to 1440p if your bandwidth allows for it. At least, this is how YouTube behaves on desktop browsers on Mac, Windows, or Linux.
Sometimes YouTube can get it wrong, or perhaps you’ve just manually set the quality of your stream higher than your internet connection can handle. In which case, tap the three dots in the Android or iOS app, and then Quality to change to something lower quality.
If you’re using a desktop browser, select the gear icon in the player window to access Quality Settings.
Clear the Browser Cache
Web browsers have temporary data caches where the information you frequently request from the web is stored. Usually, this speeds up your browsing experience tremendously, but caches can become corrupt or otherwise cause problems.
You should manually clear data from your browser’s cache to ensure you’re not seeing YouTube buffering because of cache issues. The exact way to do this differs depending on your browser, so check out How To Clear The Cache Of Any Web Browser for detailed instructions. With a clear cache, you can at least rule this one out as the cause of your issues. Clearing your browser cache does not clear browsing data, so you don’t have to worry about wiping your browsing history.
Wi-Fi Signal Problems
If you’re using Wi-Fi, there’s a good chance you’re getting poor YouTube performance because you’re having signal issues. Wi-Fi signal bars can also be deceptive here since you may have high signal strength but also suffer interference.
Try moving to a location close to your router and see if the problem is resolved. If YouTube has better loading times when you’re close to the router, you’ll want to look at ways to boost a weak Wi-Fi signal.
Change Your DNS Server
The DNS or Domain Name System is the phonebook of the internet. When you type in an address such as www.YouTube.com, it goes to a DNS server which translates that address into an IP address.
If the DNS is slow or has problems, that will affect how quickly pages load or even prevent them from loading in the first place. Google (which owns YouTube) has its DNS servers at 8.8.8.8 and 8.8.4.4, so try changing your DNS servers to something other than your ISP’s default offering.
Use the Download Feature
If you’re a YouTube Premium subscriber, you can download a YouTube video instead of streaming it. If you’re willing to wait a few minutes, you can use this download feature to get an offline video copy, thus ensuring perfect playback.
You can also use an online YouTube video downloading site, but keep in mind that this is against YouTube’s terms of service. Although these services are anonymous, there’s no serious risk of being banned.
Remove Ads
YouTube is one particularly ad-heavy website, and those advertisements have the potential to interfere with the playback of the main video content. If a pre-roll advert isn’t loading, you may never get to the video you want to see, and advertisements can have buffering problems.
You can remove advertising from YouTube altogether by subscribing to YouTube Premium. The Family Plan covers six YouTube accounts and includes access to YouTube music.
If you don’t want to subscribe to the paid service, you can use ad-blocking software or plugins.
You Accidentally Changed Playback Speed
When most people search for “YouTube running slow,” we assume that the service is buffering or lags. However, there’s a chance you mean that your YouTube video is playing slowly!
If that’s happening, you’ve probably accidentally set the playback speed to less than “Normal.” If you’re using a desktop browser like Google Chrome, select the cog icon in the player window, select Playback speed, and change it to Normal.
Select the three dots in the Android or iOS app and change Playback Speed.
An Important Note on YouTube and Adobe Flash
While searching for advice to help with slow YouTube video loading, you’ll see advice about updating Adobe Flash Player to the latest version. You should ignore anything to do with Flash player since Flash has been discontinued for years at the time of writing. Even long before Flash was decommissioned, YouTube had moved to an HTML5 player, which has no dependency on Flash whatsoever.
If you still have Flash installed on your Microsoft Windows PC, you’ll want to update Windows to remove it or manually disable Flash, since it now represents a security risk.
