Depending on your computer and speakers, some of our videos may be a little too quiet for your situation. This open source (it's OK) player called VLC Media Player allows you to play the videos and turn up the sound much louder than your system allows.
Just go to this link to download and set up:http://www.videolan.org/vlc/index.html
Here's a video which explains how to play a video through VLC and increase the volume:
In these lessons you'll start understanding why the 'teen years' are a parent's second chance. Most of our challenges in life relate to not knowing the proper way to think about the subject. Once you understand what's really up with teens, then the path to improving things even more will be obvious. Enjoy!