the previews are auto generated, or the option to create our own is possible. The image and roll over gif are also the same, both options...
I always generate my own image, the gif and preview depends on both what´s being seen, I like each to be a different part of the scene.
$20, this must be for a 20mins or longer scene, I usually charge just $1 a min or less for longer than 12mins...
https://www.manyvids.com/Profile/577.../Store/Videos/
now with my own clips site, I only charge $5 a clip, welcoming you to check through, there´s over 10 pages of everything you could imagine...
https://nataliek.xxx/store
Oh, and I do like the new C4S preview editor, wtg c4s!