jellyfin-audio-player VS intro-skipper

You're welcome! Finamp is very good, then there's also https://github.com/leinelissen/jellyfin-audio-player which is also worth trying.

Fintunes: Streaming audio player for Jellyfin

Check out Fintunes for music! https://github.com/leinelissen/jellyfin-audio-player

jellyfin-audio-player Has a more iOS-centric design

I’d also like to point out Jellyfin Audio Player, which looks far more native on iOS.

Jellyfin Audio Player also exists, but I've not tried it quite as much. It seems to be somewhat inferior to Gelli feature wise, and also doesn't have offline mode. It does have a unique somewhat "iOS-like" interface if that's something your brother would like. It is also installed by sideloading.

Your best shot at this point in time might be trying the unofficial Jellyfin Audio Player.

you could always cut up the video into segments A,B,C,D,E using like ffmpeg -ss 00:00:00 -t 00:10:00 -i input -c copy A.ext (where A is the first 10 minutes of video) and then recombine with https://trac.ffmpeg.org/wiki/Concatenate, might take a while though and some basic math. maybe you could do something programatically with chromaprint by identifying the repeating audio segments? that's just an idea since that's what this jellyfin plugin does to identify repeated segments of shows in the form of opening credits.

Is anyone using the modified web interface for the Intro Skipper plugin https://github.com/ConfusedPolarBear/intro-skipper/blob/master/docs/web_interface.md with Unraid?

You mean the beta software with many bugs? Not remotely acceptable in my opinion. https://github.com/ConfusedPolarBear/intro-skipper/issues

Make sure to follow the instructions - Here

Download and extract the latest modified web interface from GitHub actions Click the most recent action run In the Artifacts section, click the jellyfin-web-VERSION+COMMIT.tar.gz link to download a pre-compiled copy of the web interface. This link will only work if you are signed into GitHub.

I believe you would have to install the modified web interface to get the prompt to skip the intros. Instructions to install the modified web interface if you run Jellyfin as a container: https://github.com/ConfusedPolarBear/intro-skipper/blob/master/docs/web_interface.md

Please read through the installation instructions on the README and the instructions for using the modified web interface (method 2 is what I helped improve).