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

Fennec F-Droid is based on the latest Firefox release (codenamed Fenix)

https://github.com/Alex313031/Thorium-Android There is this browser it supports arm32, I don’t see support for armeabi v7a, I don’t know will it work, not really familiar with tech side of that

https://www.viayoo.com/en/ This is browser for older devices, very lightweight, even managed to install older version on Android 2.3.4

https://f-droid.org/packages/org.mozilla.fennec_fdroid/ And this is Firefox fork, maybe it will run more smoothly than Firefox

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.