I have tried responses from everyone and nothing is working. I did the internet options and I have quicktime and real player.
130368
Just right click on that X and click on Show Picture from the menu
503560
I'm having the exact same problem.  I've tried multiple browsers, I've made sure Java was updated, nothing works.  It's not your system, it's Yahoo's fault, but their customer service is worthless, there's nothing we can do. For anyone who hasn't bought it yet, please don't buy it.
153540
try checking your browser settings, make sure you have an updated java software and windows media on the pc
58810
Search for some software on the net which will either play it directly or convert it to some which you can play with your existing software.\nEG :\n*.mov,*.3gp = Quick time player .\n\nOr you can post the file extension here so that more specific help can be provided
246754
Sometimes the programme you use for the media needs an update :), so try to update it and it's free most of the times !\n\nSometimes else, you need to try a diffrent programmes to play some kinds of media ..\n\nI wish that I helped you a little ..\n\nPeace ..\n\nPS: I get this problem when I play some avi movies, so I'll put a web site for a player which helps me a lot :) ..
7640
It sounds like you are playing a file the protected, and you need purchase a license before you can play it.  Try to a play another media file from your computer and see if it works.
43832
I dont think the problem is with your computer ... You might not just have the right player to play the video. Try downloading the latest Media player or real player or quicktime player. If you have these then you will have to install approppriate codec so that player can efefctively play those videos. download http://www.free-codecs.com/download/K_Lite_Codec_Pack.htm and then try playing the video
663432
try reinstalling the firfox and then install the quicktime...if it still doesnt work try to find any etxentions for firefox..
251172
try this, in IE go to tools, internet options, programs, and reset. it might work
605571
that happened to me too, and i tried downloading the codec off of the windows site but it never worked... so i just got DivX... i think you can get it at www.download.com...
630402
You could try restarting the computer, that usually works. Maybe there's no such website or you're typing it wrong.
643542
The first thing to do, always, with any error like this, is reboot.  If that doesn't help let us know.  If it doesn't, try clearing out the temporary internet files, try getting windows media player upgrades if you don't have the latest version.  As a last resort, go to control panel, add/remove and take it out and then load it again.\n\nAs said earlier, this is a MS program, download it only from microsoft dot com, not some third party.
409554
First, make sure your sound works outside of youTube, ie in media player or iTunes.\nSecond, I don't know what browser or OS you are using to it is hard to understand the problem.\nWhat I can recomend is going to www.macromedia.com and getting the newest flash player, restarting, and trying again. Good luck.
163603
You poor thing, who let you get a Mac? \n\nOk, I will leave the sassiness aside. Is the program you downloaded an .avi file? If not, what is the extension? I am guess it is is it went straight to Quicktime. Are you sure it is actually a legit download? Those P2P sources can be touchy. There is a link below to a thread of someone having the same problem. Sounds like it is a problem with that file type and player. Also looks like there is something in there about play unlicensed material. Funny how my windows machine doesnt have trouble playing a movie (ok, that is the last one).\n\nSee second forum thread below, they talk about that problem as well.
370746
try getting a free copy of VLC media player. it will play just about anything there is, or look for the codecs for avi and the type of mpeg you are trying to play on line, download them and put them in the codec foldae in windows media player
461205
Did the same file worked before? if not, then it probably the file format support issue. it might need extra codec pack(check k-lite mega codec pack for free).\nit might be easy to try something else other than trying debug.\n\nI recommend use vlc player(http://www.videolan.org/) and it is best in terms of many file format support. Se it works or not. if you can't play it in vlc, the file have some problem.
588813
no it sounds to me liek you're missing a codec. The easiest way to do it is to download a free realplayer. Realplayer downloads all the codecs alot easier and then you reinstall the newest version of windows media player. Should work fine. Adn if that doens't work you could have a video card problem.