How do I upload or record a video in discussion?
See if these two guides help you out.
How do I upload a video using the Rich Content Editor as a student?
How do I record a video using the Rich Content Editor as a student?
Sometimes using the recording tool can be a little picky because it uses Flash and web browser security settings regarding Flash are a bit finicky. If you have another way to record it might be easier to use the first option to upload an existing video file.
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