As the tape of my ikkyu test came on screen, what I saw of my hand position on my bokken made me just drop my head, thinking 'oh dear god'. I made myself continue watching.
When I got a look at still pictures of my shodan test, I looked at my pins and said, "oh dear god". I asked one of my instructors about them; he said, "yeah, your pins suck". Onegaishimasu. I worked on them.
I've never video taped a session specifically for the purpose of self-review. However subsequent tests (mine and others) and demonstrations, and other events videotaped have illuminated both development and continuing areas to work on. As we are usually our own worst critic, yeah, "the horror, the horror".