It supports almost any video format, including AVI, DIVX, XVID, MPEG, MPG, MKV, RM, RMVB, FLV, MOV, MP4, ASF, WEBM, etc. Due to its simplicity, Free Video Volume Booster can be used by everyone, just select the video files, increase the audio volume of N decibels (we recommend a value between 10 and 20) and then click the button “Optimize”.