Eep, web based video editing, I can't think of a worse idea for real work, why are people insisting on putting the HTTP layer in the middle of everything. It is not designed or suited to it, why not just start putting wooden wheels on cars. Sure its fine for little toy videos but real quality editing that does not introduce epic (in computational terms) delays into every aspect of the work is just mental.
I understood that there's starting to be a move towards web-based video editing - ITN were using a web-based system for in-the-field reporting a couple of years ago, I imagine the practice is spreading. It rather implies that any tool-specific training on is going to be pretty pointless, by the time secondary pupils actually get into industry their available toolset will have changed somewhat. I wonder if video-editing might actually be best taught via manual cutting and splicing of physical film - it's the UI paradigm used in most video editing packages, and would give pupils and understanding of what they were actually doing.