I don't know how common it is, but it is done. For example after reading your comment I googled 'surgery videos' and http://www.nlm.nih.gov/medlineplus/surgeryv

I don't know how common it is, but it is done. For example after reading your comment I googled 'surgery videos' and http://www.nlm.nih.gov/medlineplus/surgeryvideos.html http://www.nlm.nih.gov/medlineplus/surgeryvideos.html is the first result. I also know there are surgery recordings on youtube, I had already watched some there before.