It's just to test if there are any issues regarding the Ubiquti.
The device communicates with the router, therefore it's possible that some settings have to be done.
It should be enough just to switch it off, and then try watching tv. If the artifacts are still there, we have to look somewhere elso for the root cause.
Ich bin Swisscom Mitarbeiter und arbeite im 2nd Lvl Bereich für Internet, TV und VoIP