Youtube error 400 since 2 hours you too ?

Hi to all since,

Since 2 hours i have this error in youtube i use firefox.

400 Bad Request

Your browser sent a request that this server could not understand.
Size of a request header field exceeds server limit.

Cookie: VISITOR_INFO1_LIVE=qOTwiGSA40c; PREF=f1=40000000&uvdm=1; use_hitbox=72c46ff6cbcdb7c5585c36411b6b334edAEAAAAw;

Apache Server at www.youtube.com Port 80

I think not sure because i make tons of comments with same ip and differents accounts, can it be possible please ? need to clean cookies change ip ?

thanks a lot have a nice day

Sorry for the trouble i use ccleaner was thinking enought
no if you use firefox you need to clean cookies in firefox too

Hope help if 1 day you get same trouble .-)