DevConverter converts your video files online. Amongst many others, we support MP4, WEBM and AVI. You can use the options to control video resolution, quality and file size.
VOB is a video format from a DVD disc, typically stored in the VIDEO_TS folder. It contains most of the data which is stored in the disc, such as video, audio and subtitles. The VOB format is based on the MPEG stream format and usually formatted as an MPEG-2 stream and can be opened by various video playback programs.