Of course! You might want to check out yoyoverse.com, it’s one of Chris Allen’s projects to help yo-yoers host their videos, blogs, recordings, etc. It’s a great and lately untapped resource for our community.
As far are youtube goes I’ve found a couple of ways around the music disputes but the most useful one I’ve stumbled across so far is to paste this into the description of your video:
“”“Copyright Disclaimer Under Section 107 of the Copyright Act 1976, allowance is made for fair use for purposes such as criticism, comment, news reporting, teaching, scholarship, and research. Fair use is a use permitted by copyright statute that might otherwise be infringing. Non-profit, educational or personal use tips the balance in favor of fair use.”""
I found it here: http://www.youtube.com/watch?v=TsVNWpMJ3o0
The video will also show you how to re-enable a song if it’s been shut off
As far as freestyles go, use what you want, don’t let youtube cramp your style, just make sure your song is family friendly, usually if it can play on the radio it’s safe to use at a contest. My rule is if my grandma can listen to it without freaking out on me its a safe song for a contest