Why would anybody claim that this method won't deliver? What kind of proofs we are watching at? It's not 2015? Oh shit.
Your page with traffic has to have next inside:
embed youtube video
thumbnail size of 1px is fine or use capacity 0 instead
auto play
muted sound
All of above is basic HTML available all over Google
Beside that, you should double check if your video can be embed (on YouTube account side)
Some fresh accounts are not even allowed to embed perhaps, I don't use fresh so no idea. (it's surely the case for embed streaming, you can guess why)
Your page with traffic has to have next inside:
embed youtube video
thumbnail size of 1px is fine or use capacity 0 instead
auto play
muted sound
All of above is basic HTML available all over Google
Beside that, you should double check if your video can be embed (on YouTube account side)
Some fresh accounts are not even allowed to embed perhaps, I don't use fresh so no idea. (it's surely the case for embed streaming, you can guess why)