这是来自Chrome商店的 uPin 浏览器插件，您可以在当前页面下载它的最新版本安装文件，并安装在Chrome、Edge等浏览器上。
(2) 从设置->更多工具->扩展程序 打开扩展程序页面，或者地址栏输入 Chrome://extensions/ 按下回车打开扩展程序页面
uPin is for pinning a YouTube video while the rest of the page scrolls - like when you are looking through the videos list on the right and you can hear but not see the main video - this uPin fixes that by making the video stay put where it is originally..
ver5 (0.0.0.5) using the position: sticky css this time, far more fluid/hyper
ver4 brought back the chat,, the css selectors have changed,,, good job youtube editors in general, this gets a little easier each time
ver3 after the changes at YouTube i had to re-edit the CSS..
no dotted lines, no spiffy scrollbars, no reference to ads,,
there is an advantage that uPin has as one of its features compared to the various Pop Out or Pop Up or PIP Picture in Picture extensions - and this has to do with the owner of the video/stream sometimes specifies that the video/stream must be watched in the context of the original YouTube page, and so what happens if you try and use one of these other Pops or Pips is the video player goes black and it reads: "Watch this video on YouTube. Playback on other websites has been disabled by the video owner." This does not happen in uPin,,
basically the video holds still while you can scroll up and down the page, the YouTube List pages are ignored by uPin