Very nice explained, hopefully you did understand this. But what about of the user, which have a newer version from unity and they are not able to follow your instructions? Time to make a newer lesson which contains the version 5.3 and greater. Sorry for my open and serious words.
You need to have the source model file (has "Model | Rig | Animation" tabs) where the animation came from because Unity currently has shit support for events. If you only have a .anim file it's useless.