Greasy Fork is available in English.
Show youtube download link on the left side without external service.
The is a simple userscript allows you to get raw youtube link without external service.
You could take a look of the source code, everything is fetch from youtube directly.
There is a links of video on the left side, you can click on it to get raw video/audio link.
Stream and Adaptive ?Stream only support resolution lower than 720p.
So 1080p or higher needs to download from Adaptive. But adaptive media's video and sound is separate into two parts. To get full 1080p video, you have to merge them by yourself.
This script based on maple3142/ytdl, which is my another project.
I just port some code to let it works in browser & add UI interface.
Released under MIT license.