Recently, I wanted to post a screen recording from my MacBook onto Twitter. Even though the video is only 20 seconds long, I got an error message that said “That kind of file isn’t supported yet. Try uploading a gif, video, or picture instead.”

It turns out that Twitter doesn’t support .MOV files, common file types for videos older videos or those recorded with certain webcam software. In this tutorial, I’ll show you how to post your FLV or AVI video clips on Twitter by first converting them to MP4 files.

Step 1: Upload Your Video to the Kapwing Converter

I recommend Kapwing’s free Convert Video tool. Start by uploading the video clip that you were going to post.

A screenshot of the Kapwing Video Converter homepage.

Step 2: Convert the File to an MP4

Once you’ve uploaded to Kapwing, select the MP4 option in the dropdown menu in the upper right corner. If you have a short clip and want to convert it to a GIF, Kapwing also lets you do that. Use the Trim video button to narrow down the section you want to include in your final post.

A screenshot from the Kapwing video converter, showing the conversion options for video.

Step 3: Download and share on Twitter

Click the red Export button to process the video. Kapwing will process it quickly – since Twitter videos can't be longer than 2:20 in length, your file should be ready to download in under a minute.

A screenshot of the Kapwing download page.

After your video has been processed, download the converted file to post to Twitter. If you're not signed into a Kapwing account, sign in or sign up using your Google or Facebook account – once you've signed into a Kapwing account, the watermark in the lower right corner will be removed from your final video.

I hope this article helps you post any video you want on Twitter! If you're interested in more tips and tutorials on creating great video content for social media, check out our YouTube channel Kapwing App. And in the meantime, look through some related articles on digital media editing for Twitter:

How to Make Minimalist White Twitter Headers
How to Format Photos for Twitter
Everything You Should Know About Twitter's Fleets Feature
How to Make a Fancam for Twitter