Watching Videos/Battery Life

I downloaded several You Tube clips.  I enjoy this feature but have noticed that watching videos seems to drain the battery quicker than playing music.  Has anyone else noticed this or is it just me?

Thanks

Yes, projecting/playing videos consumes more battery power than simply playing music files.

One, the display is on the whole time, where when playing music, your Backlight setting should turn off the display after a pre-determined number of seconds. And two, playing videos is much more processor intensive.