FirstLoveMovies

Does that mean that those four hour-long episodes are expanded versions of the two 90-minute movies? That still leaves an hour unsubtitled, if someone went to the trouble of resyncing everything -- likely line by line. AI-generated subtitles would probably be easier.

Yes, Night, this is the expanded, serial version of it. Or rather they made this first, and then they cut it into two longer parts.

There was also a TV-series in German language (Die Tintenfische aus dem zweiten Stock). It was devided into 6 episodes.
So it will be pretty hard to sync the audio with jezevex's 4 episodes release.

https://www.youtube.com/watch?v=-h0ZL-B79qM
https://www.youtube.com/watch?v=oABRBOYNmdE
https://www.youtube.com/watch?v=9JdFT0EdPDc
https://www.youtube.com/watch?v=VorELiM9vek
https://www.youtube.com/watch?v=0OZiNIC7AjE
https://www.youtube.com/watch?v=o4Z1PvI5b_E