Free and Open Source Software

I'm on Linux mint, and I've been wanting to reorganize and clean out my online footprint for a while now, starting with Youtube. I realized that a very useful way to do this would be by compartmentalizing my youtube activity. This would have the additional benefit of each "compartment" having a very specific algorithmic "identity" on YT's backend, so i'd likely only get recommendations directly related to the niche of the channel, both reducing distractions and increasing gems being recommended.

So, I need a YT client with the following features:

1. runs on Mint
2. Convenient as a daily-driver
3. easy and safe to switch between different accounts
4. preferably FOSS
5. if it had a mobile version, that'd be great. But I'm not naive enough to believe that such a convenient thing would ever happen.

I'd love to hear from you!