Ok, this is still kinda confusing to me, but I did get some to work. Due to this being free, it creates a "watermark" in the middle of your video, but I'm working through that. (Anyone got a similar free program that does not do this?) Anyway, for me, I had to convert to .wmv and then using Media Manager, I convert it for "optimal playback" which then converts it back to .mp4. If I don't convert it, it doesn't work. However, I can't for the life of me, get .mp4 to work from transferring from my computer to the BB. I'm sure I'm goofing something up...but it's working for now. Thanks.