I can't upload my video January 16, 2019 03:41 Updated Make sure your video URL is from a platform that we support (YouTube, Vimeo, or Youku). If your video is not hosted on one of these platforms, you'll receive a red error message that says, "Must be a valid YouTube, Vimeo, or Youku url." Related articles Uploading a demo video Video-making best practices Voting for a submission Adding and removing hackathon managers Discussions