I know
NastyDollars does - but not sure if the vids are specific to their Cam site...
PussyCash definetly does - their videos are teasers for actual performers. Very good tools here.
Both
CamSense (CamContacts) and
ClickCash (iFriends) let you link directly to performer home pages and I believe videos - I actually haven't tried.
Are you looking for FHG to add to your Submitter, etc.? In that case Nasty Dollars may be your best bet as the others work a little different