Also, both physical and digital casinos have their own set of pros and cons which is why it all comes to individual preference at the end of the day.
Like op said. It's just a mere betting shop and in my country for instance such betting shops might not think of installing CCTV except in bigger stores that are found in the city. I don't know but I guess I've come across same news before on the forum. But never the less, this is more reason why we need to be careful even during our gambling activities. That's because for such kind of huge amounts, even the betting company may be hesitate to pay the gambler in full.
They might have planned it with their worker not to release the fund since he obviously played with a very small amount and will be a huge loss to them. Taking them to court won't return the money because if it wasn't stolen by the betting company itself, how then was the worker able to produce 3 million from the money which he claim to have be withdrawn earlier by someone else?.