If your question or objection to this argument is Who made God? then you haven’t understood the first premise of the argument. Spot the word begins.
Try the question again and define God as at 3:48min in the video and the way theistic people do (believers in God) and see why that question is a bit on the nonsense side.
Who made God? Who made the unmade One? Oh dear ….
You might want to argue with the first premise (whatever begins to exist has a cause) and dispute it, refute it (maybe) but that requires more ex nihilo (from nothing) belief than the average theist can muster. I truely do believe the atheist has more faith than me.