Whilst I don't do this myself, my understanding was that if you put an HDMI 1.4 cable in to your HDMI (2) socket, (Where it says ARC) then connect that to something that records, it should record wot it sees on the tv.
I've not tried this as all my things that record stuff are pre-hdmi !!! (Other than Sky box which records more than I will ever watch.)
When daughter wants to record something like youtoob she gets it on the lappie to record first, and lappie has hdmi cable socket. Links lappie with any old hdmi cable to Pana tv.