There's little evidence the trump clip was found using 'new tech'. Most likely somebody in Access Hollywood remembered recording it and it went from there.
The article seems fairly careful to not claim that.
The article is a marketing piece for a technology sold by its publisher.
Some say Billy Bush himself was involved, beyond just being in the recording.
After watching the video, Billy Bush seemed more lecherous than Trump after they got off the bus. Not defending Trump, but since there's no context at the start, I wonder if Bush steered the conversation down that road in the first place.