Olá vou te passar as regras q estou usando em cache, repare que adicionei outras para o YOUTUBE porem cadas vez que eles alteram o sistema vc tera de criar ou alterar.
/ ip web-proxy cache
add url="http*youtube*get_video*" action=allow comment="You Tube - Video" disabled=no
add url="http*youtube*video*" action=allow comment="You Tube - Video" disabled=no
add url="http*googlevideo*get_video*" action=allow comment="You Tube - Video Goolge" disabled=no
add url="http*googlevideo*video*" action=allow comment="You Tube - Video Google" disabled=no
add url="http*video.google*get_video*" action=allow comment="You Tube - Video Goolge" disabled=no
add url="http*video.google*video*" action=allow comment="You Tube - Video Google" disabled=no
add url=".google.com" action=allow comment="Google" disabled=no
add url=".youtube.com" action=allow comment="You Tube" disabled=no
add url="http*globo*get_video*" action=allow comment="Globo BBB - Video" disabled=no
add url="http*globo*video*" action=allow comment="Globo BBB - Video" disabled=no
add url=".globo.com" action=allow comment="Globo" disabled=no
add url="http*tiktube*get_video*" action=allow comment="TIKTUBE - Video" disabled=no
add url="http*tiktube*video*" action=allow comment="TIKTUBE - Video" disabled=no
add url=".tiktube.com" action=allow comment="TIKTUBE" disabled=no
add url=".images.uol.com.br" action=allow comment="UOL" disabled=no
add url=".orkut.com" action=allow comment="ORKUT" disabled=no
add url="https://" action=allow comment="Dont cache Dynamic HTTPS Pages" disabled=no
add url=":cgi-bin \\?" action=allow comment="Dont cache Dynamic HTTP Pages" disabled=no

ei cara
queria sua ajuda
meu mk
ta funcionando cache full a globo ta passando pelo a cache
agora o youtube nao consigo de jeito nenhhum ja fiz tudo
coloquei a regra no access no cache coloquei ela emcima
mais nao funciona

ja almentei
Maximum Object Size 120000
nada

agradeço se poder da uma ajuda
abraço