If you are looking for an old vintage soft look for your videos, here is an interesting and fun idea. Use a crystals on top of a broken lens filter.
Lindsay Adler of Creative Live shares a pretty neat trick where she uses a broken UV filter as a mount for a cheap crystal. The light break and diffracts when hitting the crystal and creates a soft image and if you are lucky a reflection.
While we have shared a similar idea using a nylon bag, I must admit that this in-the-camera 70s effect has a different quality to it.