Not a video, but News (although there are videos on the page):
Looks Like IK Multimedia has released their new AmpliTube Custom Shop
where you can buy Single amp models.
Also looks like you can get Amplitube 3 for
Free
http://www.ikmultimedia.com/amplitubefree/features/
here are the videos:
http://www.ikmultimedia.com/amplitubefree/videodemo/
OR Direct links to videos on Youtube:
http://www.youtube.com/watch?v=eZY6HXzPfKY - Trailer
http://www.youtube.com/watch?v=_P6x-58iHLg - Custom Shop Tutorial
http://www.youtube.com/watch?v=RV4thCEJXb0 - Fender
http://www.youtube.com/watch?v=sx4ehy0uhYY - Orange models
http://www.youtube.com/watch?v=zWT9njRd57A - Soldano
http://www.youtube.com/watch?v=pTGtgwdKzBc - T-Rex