Here are some of the more explicit DVDs with strapons.
Straight videos:
Bend Over Boyfriend– Carol Queen gives very clear instructions
Bend Over Boyfriend 2 – More rockin’, less talkin’
Lesbian videos:
The Crash Pad Series Volume 1 – New from Shine Louise Houston
Full Load: Scenes from ssspread.com – Vignettes and explicit strapon scenes
Hard Love and How to F*ck in High Heels – Lots and lots of dildos in all different colors
Suburban Dykes – A classic with Nina Hartley