[squid-users] question in "WARNING: Closing client x.x.78.133 connection due to lifetime timeout"

hi ,
i want to ask about frequent warning in cache.log , it always occurs in
youtube

here is sample below :
=======================================================================
2013/08/26 21:23:38.003| WARNING: Closing client x.x.78.133 connection due
to lifetime timeout
2013/08/26 21:23:38.003|
http://r3---sn-25auxa-b15e.c.youtube.com/videoplayback?algorithm=throttle-factor&burst=40&clen=3116529&cp=U0hWTFVSTl9OT0NONl9NTFJDOkRVVldsRkY4Y3Za&cpn=GhqQknitnAkg_8jW&dur=270.033&expire=1377570295&factor=1.25&fexp=912305%2C927905%2C904834%2C900393%2C916611%2C929117%2C929121%2C929906%2C929907%2C929922%2C929127%2C929129%2C929131%2C929930%2C925726%2C925720%2C925722%2C925718%2C929917%2C906945%2C929919%2C929933%2C912521%2C932306%2C913428%2C920605%2C904830%2C919373%2C930803%2C904122%2C932211%2C938701%2C936308%2C909549%2C900816%2C912711%2C904494%2C904497%2C900375%2C906001&gir=yes&id=e9946fcac15b9258&ip=x.x.78.133&ipbits=8&itag=160&keepalive=yes&key=yt1&lmt=1371131426902416&ms=au&mt=1377543922&mv=m&range=540672-720895&ratebypass=yes&signature=3C71776F00EF3BDAE460E61F90C568F3087493EC.26D5B33E4CD2B031F29E52D498F5CDD344076DFB&source=youtube&sparams=algorithm%2Cburst%2Cclen%2Ccp%2Cdur%2Cfactor%2Cgir%2Cid%2Cip%2Cipbits%2Citag%2Clmt%2Csource%2Cupn%2Cexpire&sver=3&upn=xVOsGLE3DUs
=============================================================
1st all of that , this is just a sample and there are alot of samples
similar to it :)

Q1- what does this mean ??? does that mean that error occured on client
side ?? was it dispertion in watching video or hanging in watching video
??

Q2- does this a harmful issue ? does squid affect youtube ??

Q3- if im not caching youtube videos , why should i allow youtube traffic
to go to squid ??? is it better for me to deny youtube traffic from being
injected in squid ??

i wish some advices in this questions above :)

regards

-----
Mr.Ahmad

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