Clients do not care about other magicians on youtube and whether they're good or bad. Clients care about the entertainer they are hiring and if they haven't seen you personally then they will google your name. This google search will show them videos of you from youtube and if you overwhelm them with videos then they will hire you because you "have" to be good since you have so much information.
Youtube is the second largest search engine on the internet (Google being number one). If you don't use Youtube then you lose out on so many business opportunities. You can use Youtube to be number one in google searches by making videos and typing "(insert your city here) Magician." So when people search for your city and magician then you will be number one.
Youtube can be used to for SEO marketing, branding, an online promo kit, and more.
It sounds like you are leaning more towards using youtube as a performance tool rather than a business tool. If you want to use it as a business tool then not only should you put videos up but you should create TONS of videos.
Let me give you an idea of what I send to companies and associations that need more information about me. First I will mail them a hard copy of my promo kit and then I send them an online version of my promo kit and all of this:
I attached my promotional kit for you to take a look at. You can also get a lot of information on my website http://www.BenjiBruce.com
Send me an email if you would like me to show more videos of the interactive mind reading entertainment that you can also share with friends and colleagues that make the decision about hiring entertainment for events.
And below are some youtube links to a couple of videos.
The Charming Mentalist Demo...http://www.youtube.com/watch?v=Ibmn6lpiaLQ
Benji Bruce guesses a name thought of by a random guest...http://www.youtube.com/watch?v=t59eTPr9I_M
Mind Reading on the radio...http://www.youtube.com/watch?v=sDXXJDRhDOYhttp://www.youtube.com/watch?v=4nFvqN3X8og
Benji Bruce is an entertainer and speaker for Fortune 500 companies, colleges, and celebrities across the nation. Find out why companies like Hilton, Edward Jones, and Intel hire Benji when they want to make an impression at their event.
Mentalist, Stage Hypnotist, Motivational Speaker
Demo Video: http://www.youtube.com/watch?v=Ibmn6lpiaLQ