Hi Ludovic,
I do not know of any plugin that can do that directly, but you might be able to come close by doing what I used to do. I used the Dialogue activity, because it would let students upload a file to me. I would have them take and save screen shots, and then send them to me.
Now that the Atto editor can also directly record audio and videos, they can even add a quick audio explanation of the problem in their messages to me.
NOTE: I put each student in a separate group and made sure the dialogue permissions were set so that students did NOT have access to all groups, which prevents them from sending a dialogue to anyone but teachers and admin.
Other possible activities you could use the same way is the Journal, Database, and Forum.