In Practice, you can upload pre-recorded video or audio files as exercise submissions. These files can be up to 1 GB (gigabyte) in size. Practice accepts MOV, MP4, WebM, FLV, AVI, MPG, or MPEG video files and MP3, AAC, WAV, WMA, and AIFF audio files.
If you upload a video file and run into a processing error (like the one pictured below), it's likely that the video file you uploaded was invalid. To determine if this is the issue, first check to see if you are able to watch your video file on your computer. If you are able to watch your video, then there may have been an error on our side. In this case, delete your Submission, and re-submit your video.