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If you want to go beyond sharing text, pictures or audio on Twitter, you can not only share videos with Twitvid, but even upload from your iPhone 3GS with their new mobile application.

That’s in addition to their earlier integration into popular iPhone Twitter app Twitterfon.

Alternatively the site itself allow you to upload a video file or capture your webcam, tag people, tweet it, and also send to Youtube at the same time.

There’s also an API available.