Note: yes, I do collect movies and TV shows on DVD and Blu-ray. But some shows are not available on physical media, at least not entirely. This is about those shows. And before you suggest [this](https://www.youtube.com/watch?v=i8ju_10NkGY), with the exception of shows/movies that are not legally accessible at all, I am fairly anal about acquiring things legally. I don’t always use those avenues to watch something, but I still try.
Now then… I want to buy digital TV show episodes and seasons and rip them for personal use.
From what I’ve seen, there are only a few services that let you purchase digital copies of TV show episodes and seasons, at least in the US: Vudu, YouTube/Google, iTunes Store, Microsoft Movies & TV, and Amazon Prime Video (let me know if I missed any). According to a single Reddit comment I saw recently, Amazon’s video files are the source of high-quality torrents floating around [the uncharted waters of the web](https://www.youtube.com/watch?v=i8ju_10NkGY). Other than that, I have no idea which of these places has the best-quality video or audio.
Of course, we all know what can happen if you buy a season or episode from these sources. The show could be removed from the service, and the company could revoke access from people who paid for them. Or the service could get discontinued entirely. That’s why I want to not only buy these TV seasons, but rip/convert them to a more stable video file that’s compatible with any video-playing device and can be played without an internet connection. Seems there are only a handful of options, and they’re mostly for iTunes video (ViWizard/TunesKit looks like the main one). What about the other services? Can their video files be ripped (Amazon, perhaps)? I don’t care if I have to pay for software as long as it does its job properly.
Also, bonus points if it’s possible to rip the closed captioning/subtitles, too. I like having those.