Powder Player
4.5 out of 5 stars (based on 2 reviews)
The ultimate video player experience: a video player that supports torrents, over 1000 websites and local media. Offers casting to Chromecast and AppleTV, auto-fetching subtitles, detailed information about items and much more.
I want to add it’s worth mentioning, that their website: https://player.powder.media/ has trackers and ads. On the one hand I guess because they embedded the youtube video to showcase how it works but on the other hand they use google-analytics.
“open source, free to use and doesn’t contain any paid ads” – seems very trade-free.