You can use some of the alternatives like Piped in web browser or desktop app called FreeTube

Was using Tiny 10/modified Windows 10,but switched to Linux Mint beacuse of low system requirements and low resource usage,as I have 15 year old PC

You can use NewPipe or Tubular for Android

Also there is https://piped.video/trending for watching in browser and Revanced on Android

And for anyone using YouTube Music there is Desktop app for Linux,MacOS and Windows https://github.com/th-ch/youtube-music

I have 3GB of RAM on my PC running Linux Mint, using LibreWolf, it works pretty great for me, I mean I can’t open 100 tabs, but 10-15 is possible

https://github.com/BobbyESP/Spowlo

There is this app for Android, you paste link form Spotify but it uses YT to download song. I don’t know is this what are you looking for but it may help.