Look around the BST section, a software is being sold for $7 which can spin videos and make them unique
This is simple, you don't need a spinable software, u can do it with any editor... when it comes to videos, all you have to do is change the size of the original... and that is it, so when you render or save just save it with greater or smaller size. this could be dimensional therefore it will change file size. I do this all the time.