A few days back I downloaded some videos from YouTube using Internet Download Manager (IDM). While playing it online the video had sound but after downloading it fully, the video had no sound. Another thing I noticed is that I am unable to play those videos in VLC whereas Windows Media Player runs them with no sound.
Are there any specific reasons for this? How do I get the sound back for those videos? Why are these videos not playing in VLC? I am using VLC version 2.0.0.