I think I've watched Silicon Valley (on HBO though) about 5 times and on my 6th time now... XD

Other solid "on the side shows" I've watched while levelling/grinding are Its Always Sunny In Philadelphia, Rick & Morty, Southpark - basically all shows I've watched at least once before so I don't feel I'm missing something through split focus.

I run five clients on a 3840x1080 screen, a TV show on a normal monitor above and mail/WA/WoWHead etc on another normal monitor above.