[darththeo]

There is no process in the movie. You see flashbacks to them being older in a still image, but that's it.

Whether or not this is "canon" to RWBY is up in the air. There is nothing as of the moment that makes it absolutely not canon. However, if it is canon, it is likely being inserted in the timeline during Volume 8, as it cannot be post-Volume 9 nor during any prior Volume.

If you know nothing of RWBY, it does a decent job explaining the basics of the world, but you are going to be lost on a lot as the RWBY characters aren't nearly as well known as the DC ones.