You can't make this stuff up. The common "disinfectant" being used during the time of that video was rubbing alcohol and bleach. Like it or not, that's what he said.
C'mon. In addition to Fox, he's run 2 small non-profits that went belly up. Even his mom couldn't give him a recommendation. Credit where credit is due.
Obviously you cannot initiate RTH when signal is lost.
Your drone probably initiated RTH itself, just as it is programmed to.
If in any doubt, you could always check the recorded flight data to see what actually happened.
But RTH is now a lot...