Q: if it is possible to recover deleted videos from a JVC Everio HD?  I understand this is a last ditch effort to get it back and yes I've learned the hard way back up everything. 

Well, it happens, sometimes it’s a lapse of mind when faced with the “Delete all” confirmation; sometimes your lovely kids express too much interests and resolution toward the modern technology. Anyway, the precious lost videos and photos can be retrieved from the camcorder with proper video recovery tool, as long as you haven’t used the JVC Everio intensively to have the new videos saved over the deleted ones.

Instructions 

How to recover deleted videos from JVC Everio camcorder

I.Download and install mac video recovery for JVC Everio

II.Connect the camcorder to mac and power it on

III.Launch mac video recovery for JVC Everio, select the device and click “scan”

IV.Once scanning process complete, a list of deleted files is displayed, the files are organized by file types and file extensions.

V.Select the files you want, click “recover”