With this free MP4 video editor, you can cut, add filter, encode or decode MP4 videos. Besides supporting MP4 video files, it can support video formats like AVI, MPEG, MKV, ASF and more. You can save the WebM format firstly, and then losslessly convert it to MP4 format in VideoProc Converter. Avidemux is a free open-source MP4 video editing program for Windows, Mac OS X and Linux. For that reason, some high resolution video versions are only available in WebM when the analyzing engine approaches the task. Y ouTube started transcoding new uploads to WebM early in 2011. When it is converted and saved to your local folder, there will be a pop-up window with the file inside.Choose a resolution in the format you prefer, and hit the blue button to convert YouTube to MP4.Click Analyzeand wait for the engine to display available options.Click Add Video, and paste the link of the video you want to convert.Download and install VideoProc Converter, launch it and go to the Downloader panel from the home screen.