YouTube is a great place to promote products and services because of its huge audience, and its search-engine friendly layout.
It is impossible to predict which promotional videos will go viral and which will not, but even if a promotional video does not become a "YouTube hit" immediately, entertaining content will still allow any video to build up thousands of views over time. So, the sooner you jump in and make a splash on YouTube the better.
According to YouTube's Terms of Use it is permitted to...
"upload an original video to YouTube, or maintain an original channel on YouTube, to promote your business or artistic enterprise"
I often make promotional-style videos for fun, or to place something new or interactive before the YouTube community. Some of those videos can be seen in my 'promo-style' playlist here on xgobobeanx.com.
My personal xgobobeanx network alone is fast approaching 10 million views, as recorded and verified by Tubemogul.com.
If you would like to hire me to assist you with a promotion please contact me with details via the simple Contact xgobobeanx form and select the category "Job opportunity".