4Videosoft MKV Video Converter for Mac is able to convert MKV video to MP4, MOV, AVI, FLV, etc. with the best quality and speed. You can optimize the output videos with the versatile editing functions. It enables you to reset the video length and size; add personalized watermark and modify the output video effect. The output video can play on your portable devices like Samsung Note 5, Samsung Galaxy S7, iphone6/6S, iPhone 5S/5C, iPad Air, etc.