trendy

Thank you for the passing on to the developers

Yes, following the configuration from OpenWebif also makes sense!

Thank you for the explanation!

Maybe then it would make sense to remove the option for streaming port from OpeWebif, as changing it it will only break things?

Yes, it still persists on 8001.

We're getting somewhere. 8001 is indeed the streaming port, however it isn't following the configuration, which is 8080 and is added in the stream urls, e.g:
 

#EXTM3U 
#EXTVLCOPT:http-reconnect=true 
http://vusolo2.mrv:8080/1:0:1:28:2:212C:1860000:0:0:0:

Reverting the port to 8001 makes the links work, as they are now using the correct port.

But it still makes me wonder when did it break and stopped following the configuration.

I am not saying it is the default port for streaming. I might have changed it to 8080 in the past at some point. I have this stb for about 10 years already so it's hard to remember what was the original port. But streaming was working fine on 8080 and now it is not. So I am trying to understand where to look for any hints why the 8080 is not open.