Depending on how much you watched it, I can see some justification for why she'd ask you to reduce your consumption. But asking you to unfriend girls you don't know? That's pretty insecure and controlling on her behalf. Blowing up about one or two videos buried on your laptop that you didn't know where there is also rather unreasonable.

If there's other things she's also 'dictated' to you, then you're in an abusive relationship/dating someone with narcissistic tendencies, you just haven't noticed yet.