"New media" pundits have discovered that you can play videos at a higher speed to get through the clip they want to comment on faster. What some of them _haven't_ discovered is that if you don't use a proper playback tool it'll resample the audio so the people in them sound like chipmunks on speed.

If you're going to speed the video up, make sure the audio doesn't get a higher pitch. Very common tools, including free ones, can handle this.