No, I doubt the analytics software can tell the difference. It just sees the user skip from timestamp X to Y

Install Newpipe.

Tap the share button in the YouTube ReVanced app.

Select Newpipe. It'll ask you some info about the download, then start downloading in the background.

Yeah. You have to download in an external app. That was something I did use a fair bit with premium but it's no biggie that it's gone for me.

I mainly just use ReVanced for YouTube and YouTube Music. It supports some other apps I use (like Twitch or Spotify), but there are better alternatives to those two. (If you'd like to see a full list of the apps supported by ReVanced and the patches available for those apps, go to https://revanced.app/patches .)

Someone created a version of the Twitch app that supports BTTV emotes, blocks ads, auto-claims channel points, and auto-updates whenever there's a new version available. They called it BTTV, though I don't believe they're actually associated with the BTTV browser extension.

As for Spotify, I use xManager. They patch the Spotify app to allow ad-free music, among other Spotify Premium features. (Not every Premiums feature is enabled. Some require communicating with Spotify's servers, and those aren't enabled.)