Here is a log of caching of videos from youtube with Squid and cachevideos:
First time
2009-06-27 21:13:45,852 4295 10.100.100.2 - REQUEST - http://v17.lscache5.googlevideo.com/videoplayback?ip=0.0.0.0&sparams=id%2Cexpire%2Cip%2Cipbits%2Citag%2Cburst%2Cfactor&itag=34&ipbits=0&signature=25801F56E31BE2A4F6A7BD9BD73CBEAFDCE9B386.1EB2C6651BE854AA5FA600DF93BF2A04C066E3F0&sver=3&expire=1246154400&key=yt1&factor=1.25&burst=40&id=c593f35e8f7b9ba4
2009-06-27 21:13:45,852 4295 10.100.100.2 c593f35e8f7b9ba4 URL_HIT YOUTUBE http://v17.lscache5.googlevideo.com/videoplayback?ip=0.0.0.0&sparams=id%2Cexpire%2Cip%2Cipbits%2Citag%2Cburst%2Cfactor&itag=34&ipbits=0&signature=25801F56E31BE2A4F6A7BD9BD73CBEAFDCE9B386.1EB2C6651BE854AA5FA600DF93BF2A04C066E3F0&sver=3&expire=1246154400&key=yt1&factor=1.25&burst=40&id=c593f35e8f7b9ba4
2009-06-27 21:13:45,853 4295 10.100.100.2 c593f35e8f7b9ba4 CACHE_MISS YOUTUBE Requested video was not found in cache.
2009-06-27 21:13:45,859 4295 10.100.100.2 c593f35e8f7b9ba4 NEW_URL YOUTUBE http://v17.lscache5.googlevideo.com/videoplayback?ip=0.0.0.0&sparams=id%2Cexpire%2Cip%2Cipbits%2Citag%2Cburst%2Cfactor&itag=34&ipbits=0&signature=25801F56E31BE2A4F6A7BD9BD73CBEAFDCE9B386.1EB2C6651BE854AA5FA600DF93BF2A04C066E3F0&sver=3&expire=1246154400&key=yt1&factor=1.25&burst=40&id=c593f35e8f7b9ba4
2009-06-27 21:13:45,868 4300 10.0.0.10 c593f35e8f7b9ba4 **SCHEDULED YOUTUBE Video scheduled for download.**2009-06-27 21:16:12,011 7972 10.0.0.10 c593f35e8f7b9ba4 DOWNLOAD YOUTUBE 4122115 Video was downloaded and cached.
second time the same video
2009-06-27 21:20:15,467 4295 10.0.0.10 - REQUEST - http://v17.lscache5.googlevideo.com/videoplayback?ip=0.0.0.0&sparams=id%2Cexpire%2Cip%2Cipbits%2Citag%2Cburst%2Cfactor&itag=34&ipbits=0&signature=25801F56E31BE2A4F6A7BD9BD73CBEAFDCE9B386.1EB2C6651BE854AA5FA600DF93BF2A04C066E3F0&sver=3&expire=1246154400&key=yt1&factor=1.25&burst=40&id=c593f35e8f7b9ba4
2009-06-27 21:20:15,467 4295 10.0.0.10 c593f35e8f7b9ba4 URL_HIT YOUTUBE http://v17.lscache5.googlevideo.com/videoplayback?ip=0.0.0.0&sparams=id%2Cexpire%2Cip%2Cipbits%2Citag%2Cburst%2Cfactor&itag=34&ipbits=0&signature=25801F56E31BE2A4F6A7BD9BD73CBEAFDCE9B386.1EB2C6651BE854AA5FA600DF93BF2A04C066E3F0&sver=3&expire=1246154400&key=yt1&factor=1.25&burst=40&id=c593f35e8f7b9ba4
2009-06-27 21:20:15,468 4295 10.0.0.10 c593f35e8f7b9ba4 **CACHE_HIT YOUTUBE Video was served from cache.**2009-06-27 21:20:15,468 4295 10.0.0.10 c593f35e8f7b9ba4 NEW_URL YOUTUBE 303:http://10.100.100.2/videocache/youtube/c593f35e8f7b9ba4?ip=0.0.0.0&sparams=id%2Cexpire%2Cip%2Cipbits%2Citag%2Cburst%2Cfactor&itag=34&ipbits=0&signature=25801F56E31BE2A4F6A7BD9BD73CBEAFDCE9B386.1EB2C6651BE854AA5FA600DF93BF2A04C066E3F0&sver=3&expire=1246154400&key=yt1&factor=1.25&burst=40&id=c593f35e8f7b9ba4
