What made you prefer scoop over chocolatey? And how do you feel about the (now out-of-the-box available) winget?

To be fair, WhatsApp hasn't had any serious feature development up until the last year or so, so as far as features go, they're playing catch-up.

Sideloading is installing an app through means other than the official storefront provided by an OS. Android has always let you do that, and Android TV is no exception.

As for the ad-free YT experience? Look up SmartTubeNext.