The Church of Scientology YouTube Channel is a place where the Church has published over 450 videos about its beliefs, its practices and even provides free courses for anyone to begin studying for themselves. And while one video will certainly not answer all of your questions about the religion there is an entire website available that has an extensive Frequently Asked Questions about Scientology section.
To get even more information on the Church, you can also walk inside to any church in the various Churches worldwide. A list of which can be found also on their website.