jestli je to to, co jsem našel tu:
"MTV --- video format used by various Chinese MP4 portable video players; contains a 512-byte file header and a series of images that are displayed during MP3 playback.
Although these Chinese portable video players are commonly called MP4 players, they are unable to play true MP4(MPEG-4 AVC H.264) format videos and are limited to proprietary formats such as MTV and AMV."
http://www.iorgsoft.com/how-to-convert/video-to-mtv/
Tak to "video" musí být pěkný hnus a na koukání to moc nebude.