Scammer Payback's videos always include footage from the surveillance cameras. At least the scammers he and his crew target don't use slavery - that's more of a problem in Burma/Myanmar, not in India where many tech scammers are.
In the worst cases, legitimate companies sublet their office space to scammers - the day shift are regular callcenter employees that do fully legitimate consulting/support/outsourcing stuff, and in the night the scammer crews roll in. Utterly absurd to watch, and police usually doesn't do shit because they're paid off.