That is very interesting that some of the Deaf seniors had used to old sign language which is still part of ASL. Some of the signs have changed but not a lot. We also add new sign to the new word like e-mail. Every state have their own sign language before ASL across the coasts to coasts between United States and Canada. I have said that in another thread about that. Did you notice that he had used the Signed Exact English instead of ASL but he still like to sign ASL too.