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how do I download and not just play but retain an mp4 video file?

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I want to play a TED talk in a class I'm teaching without having to use a glitchy wifi network; therefore I want to retain the mp4 file on my computer. I could find no option to do this.

I want to play a TED talk in a class I'm teaching without having to use a glitchy wifi network; therefore I want to retain the mp4 file on my computer. I could find no option to do this.

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Go to the Mozilla Add-ons Web Page {web link} (There’s a lot of good stuff here) and search for what you want.

There are several file down-loaders, and download managers.

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How does the MP4 play currently: in a plugin such as QuickTime, or in an external player?

Modified by jscher2000 - Support Volunteer