I have Firefox, and I just installed an addon that lets me download videos off YouTube, etc, and convert them into "iPhone" format, which is .m4v. I thought this was great, so I downloaded a video, converted it, the thumbnail in the folder I downloaded it to is an iTunes one, and it says "MPEG4" along with the iTunes logo. So here's my problem: I click on the icon, assuming iTunes will play it, nothing happens. I drag it into my iTunes library, then search for it, and it's not there. I tried looking up solutions to this, but the only ones I could find are ones where the person managed to get the video into their iTunes library first which I can't do. I have no idea why iTunes is not picking up this video. I clicked properties, and it says MPEG-4 video file, which is an MP4, I assume, and I have read up that this is the right video file. So, I'm hoping someone will be able to help me.