You are viewing a video on your computer and realize that the volume is too low even if you crank up the volume level of your computer to the maximum.
No need to stick your ears to your speakers, you can increase the volume of the video using the right tools.
VirtualDub (for PC)
VirtualDub allows you to capture a video using the frame rate of your choice. VirtualDub is also able to create files in AVI2 format (which bypass the 2GB limitation of the AVI files).
You can perform real-time modifications to your videos:
Reducing background noise reduction
Compress the file size.
Increase the default volume level (of the audio track).