Can Video Avatar Pro be Used on All Types of Websites?

Yes. The only known exception to this is if the website does not use a SSL security certificate. In other words, the site must work with a URL that can start with HTTPS:// as opposed to just HTTP://.  If the your site does not use SSL, then for more reasons then I can list here I strongly suggest you rectify that. It can be done for less then $5.00/yr and most Hosting services now offer it for free and is automatically enabled when you host your site with them.