Listening to Zero Punctuation for several minutes can be chore. But, if you catch pnit's extremely funny at times. Basically it's like InemCompany in reverse. He apparently hates everything, so you will have to see a bunch to properly weigh his comments against your taste.
I am subscribed to the Machinima channel on YouTube and occasionally enjoy watching commentary videos as well. They can be very funny at times, depending who is doing them (I'll look up gamersbeware, Brittany) or inspirational to try new things in a game you have already been playing.