Let me simplify it:
1st download an app that can extract audio from video...I would recommend
Freemake Video Converter. then,
get an program named Audacity open the converted audio file in freemake
and open the file in Audacity choose File>Open then Edit>Select>All
then go to Effect>GVerb
make sure to have the following configuration:
reverb time (s): 0.1
Input Bandwidth: 0.20
Dry Signal (db): -7.0
Early reflection level (db): 0.0
Tail Level: -17.5
Then click on:
then choose file export save as other uncompressed files then save...this may take a while depending on the computers performance....
Now with both sources...
make sure to merge audio sources with freemake video converter...
drag and drop the video to the app...click on the audio speaker where there is
a link...select the audio file created with Audacity select desired Video format and wait for the file to be converted.