After watching the video. It seems like your only running on partial 4 cylinders. Have you checked your timing Marks?
Make sure everything is tdc and see if your timing is off. If it's off more than half a tooth then it can cause a world of issues at least for me it did.
Just a thought. I would definitely check your oil pump.
Drain a little oil from the pan for shavings. Just thought I'd throw some other ideas out there.