I do this but for music with Home Assistant. I haven't dug around much to see if it's possible to cast video from Jellyfin the same way. From what I read (and it's been a while) the Jellyfin API was more limited, but maybe that's changed by now.
That's what I ended up using, in order to avoid repackaging the installer I built a payloadless deployment (dummy/empty .pkg, unsigned as it doesn't matter if it fails to run, followed by a post-install script that downloads the latest installer for each software to deploy, install them, then delete the temporary folder.
We had to freeze iOS 26 deployment because Apple fucked up something with the content filter that some enterprise softwares uses (ex: CrowdStrike) that when broken (seems random so far..) blocks all network traffic, requiring a factory reset, since the only way to disable the content filter is through the MDM.
PebbleOS was quite polished compared to the other RTOS out there.
The animations were smooth most of the time, and responsiveness was great, the concept of the timeline is genius. The Pebble team made sure that it was accomplishing its main purpose (always displaying time, and time related events) really well, and then built everything around that.
I hope this revival will be sustainable and bring back some of that brilliance.
At least those are easier to acquire, and they can't get demagnetized :)
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