in these groups theres often someone that just cannot install a new app because their phones storage is full and they can’t afford a better phone (or just don’t want to spend money on it). i wouldn’t insist with these people and just accept using whatsapp

you dont need root for these things. just download the fdroid apk from its website, open the apk (you probably need to allow installing third party apps in the settings, which come disabled by default these days), then search for libretube or newpipe inside fdroid after letting it download its app catalogue (it may seem confusing that fdroid seems empty at first, but you may just need to slide down to update and wait a second for it to download the catalogue).

yes, the internet wasnt built on charity