Brings to mind how relatively few p4ps manage to disguise their manner to anyone who is familiar with what to look for. A few do: most don't. They should learn from us!
A common question asked in the days of Glasgow SWs, usually after the punt, was "how did you know I was offering business?" One had to be so discreet.... no idiot wants to walk up to a civvie and scare the fuck out of her... the m/o was to observe until sure, then casually walk past or allow her to walk past, exchange eye contact, share a smile, and she'd say, "looking for business?"
You don't need a Sergei to spot them. They walk differently, often dress differently (or in clothes and accessories that they don't look entitled to), if they apply make up they do that do that differently, and most of all look and sound as if they have fuck all to do. They also eye up men differently. You can sense their awareness of men, better or worse, but it stands out.
The only thing that struck me (I watched the first few minutes of the OP video) was what a nosy cunt the 'Alison' of the programme was!