Used it for a while. I quite liked it, but ultimately I switched to an LTSC build because there was an issue with configuring my printer’s driver that I couldn’t resolve. The tweaks likely got rid of a dependency that the driver used

It’s a patched version of YouTube IIRC

Does YouTube Playback Speed Control work on other websites? I use Video Speed Controller, and it works on almost all video players. It’s got shortcuts for your preferred speed, as well as for increasing or decreasing the playback speed.

I mostly just use NewPipe SponsorBlock on Android though, which lets you set a playback speed and it’ll play all videos at that speed by default

Based on a quick look, the biggest features it has that browser bookmark managers generally don’t have is the ability to search within saved webpages and documents without opening them. Plus, you can share bookmark collections with other people. Sounds a bit like a modern rendition of del.icio.us

Yup, it’s this one. I personally use it, and it makes the YouTube experience so much more enjoyable. It takes a second to get used to the UI, but it’s amazing once you get the hang of it

If you did want to skip sponsored content within videos, try using SponsorBlock. It’s an extension that skips ads, transitions, and other annoying segments within videos based on user submitted timestamps. Pretty much every YouTuber I’ve found with over 100K subscribers has already got segment timestamps on most of their videos. It really makes watching videos more enjoyable