As you can see, a lot of people here want to help and see you get success, but you also see the limits of being able to help remotely over a forum. In some ways, it's great because it's so easy to share photos, videos and instructions, but if you want speed and the always useful extra pair of eyes and hands on experience, you can't beat having an experienced person look over your model and make all the suggestions at once for getting it up in the air.
In fact, if you haven't flown a multirotor yet, and based on the first video -- where you were turning on the aircraft first, before the transmitter, I suspect that to be the case (but apologies if that's a huge assumption on my part) -- I think a multirotor of this size may not be necessarily the best first flight for you.
If you live near and RC clubs, I highly suggest looking into them. I'm part of one called the Charles River Radio Controllers (CRRC) and member flight instructors go out of their way to help new pilots for free. They let them fly on their own models (and don't care if a new pilot crashes), spend hours on the weekend at the field showing them the ropes, etc. All for free and without obligation to join the club. I highly recommend you seek someone with more experience out. They'll check over your airframe, make suggestions for you to correct if they deem it not ready yet, offer advice, and then,, they will buddy box you when you are ready to fly so that your chances of success is higher.
