can't watch any browser videos (ex. youtube)

This is a really annoying problem. I try to watch videos on my browser and
sometimes use flash programs on websites and it seems to always show the big
"Q?" symbol. It started about a month ago before I updated quicktime. I have
tried these things to no avail:

1. Update quicktime.
2. Reinstall and repair files. (As the Apple website troubleshooting guide
instructed me to)
3.I am using Firefox as my browser. I have gone to Tools-> Options->
Downloads-> View and Edit Actions, and played around with changing default
players and such.
4. Probably other things that I don't remember right now.

PLEASE GIVE ME SOME ADVICE!!!

Quicktime,firefox,& apple,non of these are microsoft software,how do you
expect it all to configure with WMP....You should/might try running only one
player at a time,if you run WMP only,reopen options,file types,select
all,edit
other tabs as needed.Make sure that in WMP you have the box checked
"connect to internet".

"zapatosverdes" wrote:

> This is a really annoying problem. I try to watch videos on my browser and
> sometimes use flash programs on websites and it seems to always show the big
> "Q?" symbol. It started about a month ago before I updated quicktime. I have
> tried these things to no avail:
>
> 1. Update quicktime.
> 2. Reinstall and repair files. (As the Apple website troubleshooting guide
> instructed me to)
> 3.I am using Firefox as my browser. I have gone to Tools-> Options->
> Downloads-> View and Edit Actions, and played around with changing default
> players and such.
> 4. Probably other things that I don't remember right now.
>
> PLEASE GIVE ME SOME ADVICE!!!
>