Most Helpful Guy
There are a bunch of apps that allow you to upload videos and provide pins to other individuals to use. I've personally seen other people videos they post on www.photobucket.com where they share a link to a private album for others to see. Might want to try small before you share it with the world on Youtube. You can share privately on Youtube, but it's more of a hassle.
Most Helpful Girl
I say do it. If you want to get real opinions that are not biased then I would do it. If all you get is tons of negative comments after it being up for a few weeks then take it off but give it time. I'm sure your brother and friends are being honest but I know it's hard to believe them because their opinions might be biased because they are close to you. You never know your mom and sister might be jealous :)
So put it up and give it a chance. Good luck I hope you get positive feedback.