www-gem

If you’re looking for an in-browser alternative I’d highly recommend you take a look at the LibRedirect extension for Firefox and Chromium. It’ll automatically redirect any youtube URL to your preferred alternative between Invidious, Piped, PokeTube, CloudTube, Tubo, FreeTube, or Yattee.

If you’re looking for an external app and like using a Linux terminal then ytfzf may be a good choice. I’ve briefly talked about it here. It will even allow you to search on Youtube (through invidious), Peertube, and Odysee if you so desire.

If looking for a phone app, I personally like NewPipe.

If you’re looking for an in-browser alternative I’d highly recommend you take a look at the LibRedirect extension for Firefox and Chromium. It’ll automatically redirect any youtube URL to your preferred alternative between Invidious, Piped, PokeTube, CloudTube, Tubo, FreeTube, or Yattee.

If you’re looking for an external app and like using your terminal then ytfzf may be a good choice. I’ve briefly talked about it here. It will even allow you to search on Youtube (through invidious), Peertube, and Odysee if you so desire.

It really depends on your needs and what’s important for you in the services you use.
For personal use I go with disroot and k9 for client. Here is a quite detailed overview
But they also more than email service: cloud service, collaborative tools, messenger service, calendar and tasks, paste bin…