Your dad's only looking out for your well-being / future. He's not an idiot -- he knows that this shitty youtube commentary bullshit can only last so long. Let's plays, vlogging, etc. is an extremely limited market full of people who want to be the next PewDiePie (success-wise). Sorry, but it isn't going to happen.
You're such an entitled piece of shit it's starting to physically hurt just re-reading your post. I can't fucking wait in 2-3 years from now when you remember this thread and you throw up all over your shitty Razer keyboard and your shitty Razer mouse and then start crying and get shitty gross gay tears all over your shitty Razer headset.
I'm not saying you have to go start flipping through different majors and decide what you want to do for the rest of your life right this instant, but don't sit here and compare your dad to cancer because he doesn't want you literally wasting time on making shitty videos. If you're not interested in fixing/repairing computers, that's fine. At least try and find something that's worth doing, because youtube commentaries isn't it.