I found the DVD and watched it again. It is about 24 minutes in duration. It was made by Fast Freddy back in the 1980s I would say. Half of the video covers the assembly of weber IDA 48s. The next 5 or 6 minutes cover the installation of the carbs on an intake manifold with his linkage system. The final 6 minutes or so covers synchronizing them. It does not address tuning the carbs (selection of jets, adjustment of idle, mixture, accelerator pump, etc.). All it really covers is how to synch the carbs using his linkage system. Personally, I find it of little value.
Having said that, you might find something of interest here. I will make a few copies for those interested. Please PM me with details and I will try to get this out in the next week or two.