Over cast is a tool that is used for podcasters. This tool allows you to control the speed of your video if you want to slow it down or speed it up at a certain point.Also, you can control the volume.
This tool is a web service
https://overcast.fm/
my rating is a 4/5 star
This tool is a web service
https://overcast.fm/
my rating is a 4/5 star