Its a little VPS with a large hard drive that providers often pre configure with popular apps for pirating. Jellyfin is a video server to play content, it has mobile and smart TV apps as well as a web ui to watch and manage the library. Sonarr and radarr automatically manage downloading of content from trackers. It requires a bit of config but nothing difficult if you have ever had to use Linux.

So when I want to watch a movie, I go to radar, type it in, it searches torrent trackers and grabs a release, sends it to a torrent client and then organizes it into my movies and TV shows folders. It has great connection so if its a well seeded release a movie takes less than a minute for even 2160p (although the server I currently have doesn't seem to handle 2160p streaming).

Another bonus is it seeds very quickly and I don't have to worry about running my local torrent client. So on private trackers I maintain a great ratio and I get to feel good in general about seeding.

Security wise, there is no way for your ISP to know you are on torrents like if you use a local PC. Your ISP would know you are connecting to that IP. Typically, they are located in countries with laws favorable to piracy and privacy.