Hi there,
In general most DVD's & Videos are made by a specific company to aid
with learning the system techniques etc.
Tammy Taylor - Creative Nail Design - Entity, to name a few have DVD's[phasing videos out]
For secoond hand DVD's & VID"S -
If the video is in good condition, grab it as you can always convert to a DVD
Go to a couple of your local beauty/hair/nail suppliers & make a flyer [doesn't have to be spectacular] & leave it on their notice board. These can be great trading posts
Post a request for members to pm or email you with their, no more needed DVD's.
Elite - Beauty Tech - & here are a good sites to start.
HtH
XX J XX