Not really. You can try it, but you do not have any enforcement mechanism. It would have to rely on trust with its key feature. That's a big no no in my eyes.
Discussion
Have it be a link to a video, the server serving the video can delete it and then the link won't work and the note expires so people don't see notes with dead links.
If you have an wnforcement mechanism to delete the video, sure, why not. I'd say however. that that is a solution in search of a problem.