The web's biggest trend of the last year or two is surely video clips, AKA viral videos. They seem to come in just a few varieties:

• Short funny clips from comedy shows, especially The Daily Show.
  
• Stupid stunts.
  
• Crazy nature vids.
  
• The video editor with too much time on his hands.
  
• People acting goofy in their dorm rooms.
  And my favorite,
  
• Musical virtuosity. Check out these examples. As a frustrated musician, these pain me a little bit.
  
  
  
  • Guitar
    
  • Mandolin
    
  • Drums