Why would you want to upload a YouTube video? Oh, so Storytell can run on it! Nice. FYI Storytell doesn't work on all YouTube videos -- more on that here.
Here's how to go about that:
1. Copy the Youtube video's URL
2. Paste it into the Storytell Slack chat bar
3. Hit the Enter button on your keyboard or the fancy green arrow on Slack
4. After Storytell has processed your YouTube video, you can now view its Summary report and start chatting with your content.