You had a great idea, but it can't replace hex-editing entirely, because we can't copy&paste. (well, not with notepad)
This is what we expect from your software: (I hope it's nothing too complicated)
*The "export to VBX" thing should be optional.
*The movie must be edited inside the program.
*This should appear in the main tab (should be called 'VIEW' tab or something), right below the movie info, but this section sould be editable.
frame number input data
00000000 ^ ^ v v < > < >
00000008 A B L R - - - -
----------------------------------------------------------
(bottom of the window - status bar - shows currently selected frame)
And it seems you're tinkering with other formats besides VBM... nice!
heh... when you do that, you should change it's name to "MovieWorkshop"...
I really hope your software become a standard here!