I don’t know if there are any effective ways to play animations in Google Earth- you might want to check in with the Google Earth community on that one.
The “Monster Milktruck” demo might be a place to start.
I dug around a little and came up with this link: Monster Milktruck. Keep in mind, this was originally written back in 2008 by an engineer who wanted to showcase the then new Google Earth browser plugin. YMMV.