The numerous file formats supported on YouTube include .FLV, .MOV, .AVI, .MPEG4, .MMV, .MPEGPS, WebM, and 3GPP. MPEG4 generally use standard .mp4 extension or .m4p, .m4a, .m4b, m4v, and .m4r extensions. Users may need to convert any of these formats to .mp4 media container file format for a variety … [Read more...]