If you're watching a TV show while doing cardio, you're probably not doing it as efficiently as possible.
Intervals should be pushing you towards passing out
Hybridizing cardio with movies leads to ineffective cardio. No go. If you can concentrate on a movie, that concentration can be better spent finding the willpower to step it up a notch.
As for weights, a different set of music helps /w weights if you can find the right cadence/rhythm. When I go, I try to find a song that fits /w what I'm doing... its usually not too bad. I say just use your phone for now while you experiment. Music might be good for that extra boost...