Unfortunately I can't watch the video now, as I'm in a testing center. But I'd like to see the semicolon used in another fashion than the strictly correct sense. If you apply logic, it could be allowable and I'd like to see it happen. I will continue to do so, whether it's regarded as strictly correct or not.
So, given that it's supposed to group together two independent clauses that rely heavily on each other, I like to use it to connect a dependent clause that needs more separation from the originating sentence than a comma usually provides.
This puts less stress on the other commas in the work and allows the reader to separate the thoughts more in line with what the writer intends.
Boy, it sure would help illustrate my point if I had a good example; sadly, I don't right now.