This incident has been resolved.

We've made some improvements to our video processing process and videos created today should now be able to be playable on all devices. We're continuing to monitor the situation.

We are investigating a delay in processing videos created in Seesaw on the web (using webcam, upload or Draw+Record) for playback on other platforms. Users will see a "Video Not Ready for Playback" message when trying to play a video on iOS, Android, mobile Safari or Firefox that was created originally on the web. No video data has been lost.