Is this the guy who quotes (without a proper reference) that available current from the atmosphere is 10 picoamps per square metre of exposed "collector"? (I suspect I saw the same video over a year ago.)
I only came upon Plauson's work in the last couple of years, while digging into research on lightning. It seems to be another one of those ideas that gets re-invented every couple of decades, or so, and then subsequently dismissed and forgotten.
Regarding atmospheric electricity, there is an interesting PhD thesis here, from 1964, which is worth looking at:
http://etheses.dur.ac.uk/8999/