How to reverse Video muting and editing in Moto X Play

[NzrLv]

In Moto X Play (Android 6.0.1), video file got accidentally fully muted & partial edited to fast forward. I am unable to revert original audio. Also some parts are playing in fast forward mode. Please provide a solution either in phone or using free desktop editing software.

 

[SpookDroid]

Do you have an original file saved elsewhere? If this was edited with the stock video editor and has already been overwritten without saving the original or re-coding into another file, I'm sorry to say that the audio and original video data is gone...