As far as I have been able to discover, The Sharp had eight promotional videos.

All four videos for This Is The Sharp can be found on the long out of print official VHS, "This Is The Sharp".

This Is The Sharp:

Sonic Tripod:

The Sharp's final interview on the Today Show
The Sharp's final performance on the Today Show ("Where Am I Now?" acoustic)
The Sharp in the studio
Train Of Thought promo video
Talking Sly promo video
Nightclub live on Hey Hey It's Saturday
Allan Catlin