2023-01-21 12:57:25.898 T:751 info <general>: Found resolution 720x576 with 720x576 @ 50.000000 Hz
2023-01-21 12:57:25.898 T:751 info <general>: Found resolution 720x480 with 720x480 @ 59.940063 Hz^ the 4:3 modes are present.
On the Vero 4K+ (Linux OSMC) I'll have to look later.
The Amlogic vendor kernel might work, but it is definitely not a reference 'Linux' implementation 
What did you update from? (LE9, LE10, another LE11 nightly). Share logs:
there is no playback at the moment for v4l/panfrost?
What about the avl tuners or other usb tuners/demods in LE nigthly - also no playback ?
Panfrost/Lima render the Kodi GUI (2D) and nothing more, they have nothing to do with video decoding. There are hardware video decode (and software decode) drivers using GBM/V4L2. However you still need something to take the transport stream from the tuner/demod and demux it into a supported video and audio format for playback. I've started poking around with other demod/tuner drivers and have some that compile, but none probe hardware yet (the code needs amending for upstream GPIO) and none are in nightlies. Even if we can get them to probe hardware there is still the same "missing demux" issue.
Do you actually have any media outside of 576@25 (PAL) and [email protected] (NTSC) .. because ye olde analogue broadcast standards certainly don't include those refresh rates; which is prob. why Linux doesn't invent/expose them.
And yesterday I was able to turn on the dvb demodulator for the first time. I don't know much about such things. Wish me luck.
I'm not the expert on DVB topics so could be wrong/misinformed, but my current understanding is that loading the demod/tuner drivers is 2/3 of the puzzle, and playback will not be possible until someone authors a demux driver.
Whitelist the 1080p @ 60/59.94/50/24/23.98 modes and enable adjust-refresh (start/stop) and allow mode doubling (so 25Hz is rendered at 50Hz, etc) then Kodi will upscale the PAL resolutions to 1080p, you can handle deinterlaced media, and you have no missing modes. Even if those modes did exist under Linux something still needs to scale the output to 1080p so you might as well have Kodi do it.
You don't need to install sqlite3 since it is already installed/present in the OS. And you don't need to prefix commands with 'sudo' to run them as root since you are already the root user. TL/DR; Just run the fix commands.
How is it possible that this one cable works on my television decoder, but not no the NUC? I was convinced that the cable was fine... And it works on other devices (also my kids Xbox and so on).
If it was working under older LE Generic releases you will prob. need to use the Generic-Legacy (X11) image as Generic now runs GBM which probably has no 3D support.
See https://forum.kodi.tv/showthread.php?tid=358578&page=2 .. You prob. need to run "mysql_upgrade" on the SQL host
Is there a tutorial you recommend?
Nope. VPN and SSH achieve different things. VPN will give you access to the remote network. SSH will give you access to the remote host. If you only want to admin the remote system SSH is enough and 99% easier to setup than a VPN server. Both expose services to the Internet which creates a risk; but LE is generally using very recent versions of SSH binaries which mitigates the risk of known vulnerabilities. You need to use SSH key auth to expose logins securely else the login process will be targetted with dictionary attacks. Ensure you only expose SSH and not all ports (else SMB and Kodi services are exposed too).
There are a millions of "how to use SSH key authentication" guides .. read a few and you'll see the repetition/process.
perhaps an edit to the wiki is in order to reflect more accurate information
Done
The behaviour is all about EDID data and the properties exposed to Kodi. Kodi only reads this data once at startup, so if the projector is not on when Kodi starts, the AVR does not show this to Kodi and thus HDR10 is not availble. The normal way of dealing with that is to hardcode the EDID data with "getedid create" so the Pi board always believes the AVR/TV to be connected. The spanner in that plan is you have two HDMI outputs and they aren't equal. Perhaps hardcode the Projector EDID and avoid playing HDR media on the TV (which you probably don't do).
_emanuel_ what happens with "reboot -f" ??
Software decode will drive up the CPU usage and increase temps so get a decent passive cooling case (flirc case is highly recommended). The RPi4 SoC is designed to run much hotter than you're seeing .. it's not some fragile thing that must run at 40ºC.
Do you really need a VPN? .. Or would SSH key-only auth be sufficient? (which is a one-click toggle in the GUI once you've deployed keys). You can change the sshd_config to move the exposed port to something non-standard; doesn't improve security but does reduce the number of bots that will find the port and attempt to exploit it.
VP9 .webm isn't the easiest thing to play.
There is no hardware decode support for VP9 on the RPi4 (only H264/HEVC) so it would be software decoded. I'd expect 1080p media to be okay but no ARM board will handle 4K in software.
