I don't know why you would even be ashamed. There is nothing wrong with making youtube videos; what's wrong with someone who has a hobby,and saying that it's a waste of potential is quite short-sighted, as you can learn a lot from youtube itself. Like: Communication between people,marketing,editing and many more, heck there are people who made a livelihood out of it, so once again I'll say: There isn't anything shameful with being an Youtuber. Just be strong, and do stuff that you like no matter what other people say. (as long as it's legal of course)