Twitter does not host video files.
Most of the sites listed below will allow you the option to post your video directly to Twitter, with the option to add a message if you want. Alternately, you can copy and paste the link to your video into your Tweet on twitter.com. Links to videos from the sites listed here will display your media when a Tweet is expanded so that your followers can see your video without leaving their timeline.
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Check out our Tweet & DM troubleshooting section for solutions to common problems.