Hi Richard,
The answer is yes to both of those. I've seen many sbi sites with the audio buttons on them. In fact there is a guy that will help you for free I believe. I think he works for SiteSell or at least he offers his services to the customers.
Go to
www.jugglenow.com and see the audio button on this sbi site.
You can also embed YouTube since it's a simple copy and paste of code and YouTube hosts the functionality.
Not dumb questions at all! I'm sure a lot of people would wonder that since SBI is not like a standard host.