September 10, 2015
Back again, an hour or so later. Substituting msfvenom for msfpayload in the commands shown in Vivek's video all seemed to work beautifully - with the one exception of the S flag to get a summary of the payload. Piping through ndisasm worked as shown, and so did piping through sctest. I found this file, sctest in /usr/bin, it was put there as a part of the libemu installation; and the command:
msvenom -p linux/x86/shell_bind_tcp | /usr/bin/sctest -vvv -Ss 100000
Finally, the production of the graphics report also worked just fine. For me, there was the very minor glitch, when I issued the command that I was told that dot was not on the system, and that I had to install it - which I did. And I got my graphics report. Thank you Vivek!