Dear Friends;
If I install OpenWRT on my Mercusys MR70X device that work in router mode connected to the Kablonet Infinity 401 modem in bridge mode, do I have a problem watching TV from the digital cable and the I-Kutu device i got through the cable company?
Likely tv is syrreamed in different vlan than internet.
The provider modem likely had that setup visible somehow before turning it into media converter.
Kablonet's TV Box doesn't need any special VLAN configuration, it just needs an IP address and internet access. So, there is no difference between your router running the OEM firmware or running OpenWRT, from the TV Box's perspective. As long as you allow the box to access the internet, it should work just fine.