I've been looking for a way how to create and animate an envelope, however there doesn't seem to be a tutorial on it. The main objective I want to achieve is having a letter fold and to be placed into an envelope, with the flap closing. I already found videos explain how to create paper folds and airplanes but could the same thing be applied to making an envelope?
The look I'm trying to go for is similar to this:
Christmas Envelope - After Effects templates from Videohive - YouTube