Do you understand what we're still talking less energy than the monitor it displays on.
I would bet even untuned VGG16 could do that without even a fine tune. Advertising is starkly different to content and the output is a "ad=yes/no" signal. It's a very small amount of data, probably less than the plain hardware video decoder.
It's also not a new type of load, it runs off the same power supply as any computer, a slight capacitive load, it won't even change the grid powerfactor.