Here are my favorite trike motorcycle videos:
A silent film showing a montage of still trike shots:
 
 
A bit choppy, but homemade footage from a German Trike show:
 
 
A line up of lit up trikes at dusk:
 
 
Custom trike commercial from Iron Horse Trikes:
 
Choppy but nice homemade video of an American Trike show: