Some funny demoscene related things I found at youtube (let’s keep it short for this time, no introduction whatsoever!):

• an example of how to finish the ifparty04 invitation intro – I must recognize it’s the first time I see that “we are uploading your scores” screen :D
• silenci’s fast music compo at if06 – improvising some vocals for yellow rose of texas
• did you know that timescratchers released an animation at assembly 06? well now you know and it’s there: unknown media by timescratchers
  
• there’s also their bcnparty demo: psicoffice – I like those particles, it’s all very intriguing
• sundown2006′s invtro for spectrum by evilpaul – I don’t know if that’s a real application but it’s terribly WICKED! too bad they don’t greet xplsv.com… well, we’ll make them learn that name!

Actually there are lots more videos but most of them are just demo captures. Just search for “demoscene” and you’ll get them…