(Windows) Quicktime Won't Play Video in Web Browser
IMPORTANT: QUICKTIME 7 FOR WINDOWS IS NO LONGER SUPPORTED BY APPLE
Quicktime 7 for Windows security has been updated to disable the browser plugin. If you need this legacy plugin, here's how to re-enable it.
They will no longer be issuing security updates for the product on the Windows Platform and recommend users uninstall it. Computers running QuickTime for Windows will continue to work after support ends. However, using unsupported software may increase the risks from viruses and other security threats. Note: that this does not apply to QuickTime on Mac OSX.
Note: Currently the Chrome browser does not support the Quicktime 7 (32-bit plugin) because Chrome is 64-bit. If you were using Chrome, for something that requires the Quicktime plugin, try another browser such as Firefox, Safari, Explorer, etc.To re-enable the Quicktime 7 plugin:
From the Control Panel open Programs and FeaturesSelect Quicktime in the program listOn the menu bar click Change (or right-click on QuickTime in the program list)Select Modify button from the wizard windowIn the Feature list, click the pull-down arrow next to Quicktime Web Plug-in to enable it.Click Change then click Finish.Close the Control Panel window.
You should now web able to play legacy video.
Also see:QuickTime - Playback Speed Adjustment