Very good, had no issue for the whole process to complete. I thought about soldering but then lazyness took over

Could not find one easily in France. Works with a standard USB cable but not mistake proof

Looks like the subtitle format is not compatible with your mobile client and needs to be transcoded server side. I'd check from the jellyfin admin console while watching incriminated content. Also you could try findroid with MPV player as it is more compatible

It's all fun and games until it's summer

https://en.wikipedia.org/wiki/Straw_man?wprov=sfla1

Yes I was running the Google Play version. AFAIK it doesn't work with the version from FOSS platforms unfortunately. It was a few month ago. I got tired of it and ditched it altogether. I find that a phone holder does the job with much less hassle.

I run GrapheneOS and organic maps was working fine with android auto. You have to enter in developer options to allow third party apps tho. I was using it in a restricted profile with only proprietary apps (like banking apps). Comaps is a fork of organic maps so it should work too.