IT SEEMS LIKE YOU MAY ALREADY BE FAMILIAR WITH
MY FAMOUS "BEST ANSWER", WHICH HAS LITERALLY
SAVED HUNDREDS OF YOUTUBERS.
IF YOU HAVE INDEED FOLLOWED THE ADVICE THAT IS
BELOW, THEN I AM SHOCKED. PLEASE READ ALL THE
"RATING" COMMENTS TO THESE "BEST ANSWERS" OF
MINE WHICH APPEAR AFTERWARDS:
If "your browser sent a request that this server could not understand"
plus "Size of request header field exceeds server limit", that request
is a bad or oversized cookie. (The same thing is true for "Error 400").
For some very strange reason, it seems that
most Bad Request messages involve Firefox.
Simply delete your "Cookies" and everything
will be okay. Don't worry about erasing them;
nothing bad will happen. You won't lose your
internet browser's "Bookmarks" or "Favorites".
The worst thing that could happen is you will
be asked to retype your username/password
when you return to YouTube and some other
websites -- that's all.
Just as important, you should also delete all
your "Temporary Internet Files" and "History".
Those steps will make your computer totally
"fresh" in YouTube's eyes and make loading
and buffering faster. It would also be better if
you shutdown and reboot after doing this:
Mozilla Firefox 3:
→ Tools → Clear Private Data
[x] Browsing History
[x] Download History
[x] Saved Form and Search History
[x] Cache
[x] Cookies
→ Clear Private Data Now
◘ https://answersrip.com/question/index?qid=20081219100832AAisYVB
omg thank u thank u omg i looveee you ur the best u brought my youtube baakk!!! --
i cant thnk u enough -- god blessss uuu!!!!!! -- lol thats how much i love youtube -- thnks!
There are basically three major reasons why
you may be getting repeated occurrences of
that horrible "Bad Request": A) you have two
or more accounts or computers, and you are
often switching between them; B) somebody
might be tampering with your "cookies"; and
C) you are watching way too many videos.
Could you please transcribe the beginning of
the codes that YouTube/Firefox is giving you.
Example:
Cookie: VISITOR_INFO1_LIVE=pKqnhaft7nk; __utma=27069237.3461707183281608700.1235... __utmz=27069237.1235425945.1.1.utmcsr=(d... watched_video_id_list_GalaxyYoshi=b0a5d9... watched_video_id_list_luigixd21=9b790787... stream_room=c70344b1dec4f530b3cefed39e02... watched_video_id_list_ike2142=bd2c7bbc44...
I WILL COME BACK AND REVISIT THIS QUESTION IN A COUPLE OF DAYS.