Play local video from web browser [closed]

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How can I play a video that is on a user's local hard drive when they go to my website? Also I want to sync the video with controls on the website.

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This would be a massive security hole on the part of the browser, so you'd need to use Flash or Java to request permissions and let the user select the file... I know Java can, but I'm not sure Flash can.

If you have control over their browser, you can perhaps pass in a command-line flag to ignore all security checks... but one person is going to forget to re-enable the security when they visit other sites.

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I'm afraid you'd either have to get them to upload it, or use a java applet. I don't think even the mighty Flash can do what you're looking for.