memory clip problems

I have an IMAC and use a memory clip to load "You tube" clips to for my elementary school class in Japan. The computer systems are Windows 7, unfortunately. I recently downloaded a bunch of videos to show on my class converted them to MPEG4 but when I plugged the clip into my classes computer, the memory clip doesn`t register. I mean it doesn`t even show show up on screen but its fine on my MAC.

I had problems in the past with clips not working on the school computers but this is the first time it doesn`t even register?? The computers have been upgraded recently and have "quicktime."

Any ideas on why? and the easiest way to convert You Tube videos to show on the school computers?

What's a memory "clip"? If you're referring to a flash drive, check to see how it's been formatted. If it's formatted to the Mac standard it won't show up on a Windows PC. It will show up in "Device Manager" on the PC but it will state "unknown format".

You can re-format the flash drive to FAT-32 (MS Dos format) and it should play OK on the Windows PCs.