trailers do use a lot of bandwidth. instead of changing anything on the trailer, having them embedded on a page with sales pitch and an easy join link might make more sales.

or at least make obvious join links next to the trailer links - it makes no sense to have a trailer without a spot to impulse buy like this:
http://www.hotmomnextdoor.com/

or else after each trailer in the same table cell, say something like

Click here to see the entire video
or
Click to download
or something.

trailers aren't useful if you make it hard to find the join link