Yes, I watched it.
I thought it seemed to be a pretty accurate view of how the Brexit vote was won.
Dominic Cummins can be seen explaining the whole process here:
https://twitter.com/brexit_sham/status/1082415008439521280?fbclid=IwAR0qv3VT6jQ-WfH2mV6brQL6G5lCoIEtQnv6w_uFzSiw9tmXJMVVIrlPcYA
His blog is here:
https://dominiccummings.com/2016/10/29/on-the-referendum-20-the-campaign-physics-and-data-science-vote-leaves-voter-intention-collection-system-vics-now-available-for-all/
Generally speaking, the vote was won by targeting both floating voters and previously non-voters, who have social media accounts and inundating them with highly targetted adverts - around 20-50 ads per day in the last three days ahead of the vote.
These were refined using algorithms and by testing response, so that viewers liked them, re-posted them or shred them.
The key messages were:
1. £650mn for the NHS (a lie)
2. Turkey is going to send millions of people to the UK once Turkey joins the EU (a lie)
In addition the leave campaign appealed to the emotions, while the remain campaign appealed to the emotions.
Finally (in my view), the leave vote tried to switch the playing field by using the take back control slogan, that implied the ststus quo was the situation prior to joining the EU.
As a side note, the programme seems to say that the electoral process has been taken over by the analysts at one end, and the thugs at the other.
HIghly informative, but deeply depressing (in my view)