If you are using the open source Firefox web browser to browse YouTube and watch its videos, then you might have noticed that there is an artificial delay
Google slows down Firefox users when watching YouTube…
YouTube doesn’t actually throttle the video stream on the server, they just use some JavaScript on their official website that adds delay to the playback when Firefox is detected. The Invidious client directly connects to Google servers for video streaming, but it just displays the raw video stream without any ads, artificial delay or any crap like that.
If the alternatives don’t use a Firefox user-agent, it’ll also have the same effect in reducing the amount of Firefox traffic in their logs.
When you stream a video from Google servers through the Invidious frontend and you use Firefox, the user-agent that gets reported to googlevideo.com (the domain that the requests for YouTube video streams are sent to) is Firefox. You can easily verify that yourself, go to an Invidious instance using Firefox, make sure to disable ‘Proxy videos’ in the Invidious settings, open the Developer Tools, go the Network tab and load a video. Click on any request to *.googlevideo.com and look at the user-agent, you can see, it’s a Firefox user-agent. This thread explains how the slowdown is introduced in YouTube JavaScript:
YouTube doesn’t actually throttle the video stream on the server, they just use some JavaScript on their official website that adds delay to the playback when Firefox is detected. The Invidious client directly connects to Google servers for video streaming, but it just displays the raw video stream without any ads, artificial delay or any crap like that.
I was replying to this part of the comment:
If the alternatives don’t use a Firefox user-agent, it’ll also have the same effect in reducing the amount of Firefox traffic in their logs.
I edited my comment a bit to clarify :)
When you stream a video from Google servers through the Invidious frontend and you use Firefox, the user-agent that gets reported to googlevideo.com (the domain that the requests for YouTube video streams are sent to) is Firefox. You can easily verify that yourself, go to an Invidious instance using Firefox, make sure to disable ‘Proxy videos’ in the Invidious settings, open the Developer Tools, go the Network tab and load a video. Click on any request to *.googlevideo.com and look at the user-agent, you can see, it’s a Firefox user-agent. This thread explains how the slowdown is introduced in YouTube JavaScript:
Using Invidious avoids this.
Wow! I thought it was a bug, but that code does it intentionally. Amazing.