[TippeX]

hmm for that sort of protection the only thing that springs to mind is settec alpha rom, that, or making your avi's into dvd format, making a menu and so on
for 50 purchases or a little more (guessing not > 100), then commercial replication (safedisc, securom, starfoce etc is probably not an affordable option), and sending the master disk to your replicator will do nothing protection wise, as you won't have anything protected by doing that... and the disk will be easily copied

it sounds like the 'real content' is the avi files, the exe's are probably just shellers or something not important, so perhaps drm might be the way to go

tricky situation, 1000 or more disks to be produced could probably get you decent protection (only on the exe's probably), usb dongle probably isnt worth it (it cant protect the content too much)...