Problem with playing videos

[delsmith]

Issue - cannot play videos since last Quicktime update. I get sound but just a black screen. I believe (I hope) that this is due to MJPEJ A Codec being removed. How can I rectify this error?
I have Quicktime Player version 10.0 (1238).

 

[huntnboy04]

I can not view videos from Apple's website. When I click on one a Divx banner pops up. I think I got rid of Divx, and not when I click a video it says "Missing Plug-In" along with the wait circle. I haven't been able to view these quicktime videos for sometime, all software updates are current.