system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How do TV torrent uploaders capture, edit, encode and upload their files so fast and consistently?
gpt
Automation. 

They use a TV Tuner to record the program. Then use utilities such as dvr-ms toolkit (for windows) to edit the recorded TV (calling routines like "ComSkip" to cut out commercials) and re-encode to more friendly formats (MKV h.264, etc).  

From there, it depends, but likely, they have a script that is called when the above processing is done to create and upload a torrent to a tracker of their choice. 

I used to do all of this, minus to torrent stuff, and it's very nice once you've gotten it setup and working.