I'll start this with saying that the following question is relevant, but the answer didn't solve the problem for me:
I'm running iTunes Version
12.10.7 18.104.22.168, which is the most recent version at the time of writing this on Windows 10. I bought and downloaded the latest season of Doctor Who two days ago.
Initially I had trouble downloading some of the episodes, with error 2072 being thrown in the process. The solution I found online (deleting the Downloads folder in iTunes Media and letting iTunes recreate it) worked to solve this problem and I could download the episodes.
Now they are on my device and I'd like to play them, but the episodes that showed me that error while downloading can't be played now. Starting them opens the player window and displays progress bar and control buttons, but the screen stays black and the progress bar doesn't move.
Other episodes that didn't have this problem downloading are playing fine.
I've tried the following:
Delete and re-download the broken episodes
Delete the broken episodes and re-add them from my device
Check for updates on iTunes and my device (there were none)
Restart iTunes as well as my device.
Check if my device is authorized to play my purchases (it is, otherwise the other episodes of the season wouldn't work either, i guess)
[UPDATE] I also tried downloading the episodes to my iPad (where they do play) and transferring them to my PC from there. However, as soon as they are on my PC, iTunes refuses yet again to play them. This sounds to me like a library corruption. I think I'll try to rebuild it next.
[UPDATE 2] After literally spending hours rebuilding my library (even with exporting and re-importing my old one as xml) it worked for a bit. Right until I closed iTunes and reopened it a while later. Then it got much worse: Now all TV shows that I purchased from the iTunes store either won't play at all or have no sound when they do.
[UPDATE 3] After I did that, I tried completely uninstalling and re-installing iTunes, completely with emptying out my library again. Took me some hours to get everything back up and lo and behold: No changes whatsoever. No TV shows that I bought on the iTunes store can be watched, neither downloaded ones, nor on stream.
[STILL UPDATE 3] I've also unauthorized every device linked to my account and re-authorized my computer. Didn't work either.