This program is a client for the very solid Tvheadend TV streaming server. Tvheadend supports pretty much any source you can think of, but is a little more complicated to setup.

Tvheadend is a selfhosted service meant to be run on your own server with your own TV dongles / IPTV channels / etc.

If you only want to watch TV on your PC, doing so with something like Kodi is probably a better idea, as Kodi also supports USB tuners and is simpler to setup (doesn’t require a separate server).

I really like Pop!_OS, AFAIK it doesn’t have any telemetry. It’s basically a Ubuntu fork but without the stupid Ubuntu stuff, and they’re currently even working on their own Desktop Environment.