Clone of h264ify with optional limit up to 30 FPS.
The default code limits the framerates (fps) to 30, and the best YouTube offers for high framerates (50fps+) videos at 30fps are (nowadays) 720p.
If you want to change that:
-1. view the code;
-2. enable "Allow edits";
-3. search for: "const BLOCK_HIGH_FPS = true;";
-4. chage it to: "const BLOCK_HIGH_FPS = false;".
Maybe the developer can add a button on the Violentmonkey (or simillar) dropdown menu when in the site to toggle this parameter.
When I enable this script YouTube videos won't go above 720p resolution. Not sure if there's something I need to edit in the code to fix that.