My brief video on identification tintypes, daguerreotypes and ambrotypes
 

This is a quick test video I did on my Apple laptop in my dining room (and, yes, that's me). As a test, there are a few brief glitches and is unscripted. Still, it gives a good intro into identifying the metal and glass photos. The video is hosted on my website and has been scanned for viruses and all that.

Early Metal & Glass Photos Video

Nice work. Very educational.
It would seem fewer ambrotypes have survived the years?
Thanks for the post.

Thank you for that. Quite helpful. I see these sort of things at estate sales and have never taken the initiative to figure out what's what.
Interesting stuff.
Thanks.
Rob