H.W.
I think she needs to just email the videos privately.
A youtube channel allows any jerk out there to comment, and a lot of the comments I've seen are pretty crude. Some are on topic, but a few of them are frightening.
You might consider getting your daughter enrolled in a cybersafe course and have her just send videos to friends directly. That way, she doesn't have to rely on them to go to her channel and she keeps her business private. Remember, even if she thinks it is private, people can still send the link to others. I think TFPlano makes some very strong points too.