I don’t know what platform you’re using but for desktop linux I use Nerd Dictation and for android I use FUTO Keyboard, both are completely offline and FOSS.

Sadly the amount and variance of videos on peertube pales in comparison to youtube. I need my Sherlock Holmes audio books 😩

Ooh I use apps that use the Magic Wormhole library. There’s a linux app for it called Warp and several android apps, all FOSS.

Telegram isn’t encrypted by default btw! If you want that, I’d recommend Matrix, Signal or WhatsApp (in that order imo)