Thanks for posting this video. It actually looks like it illustrates the risk of a tsunami triggered by another of the Canary Islands. Maybe there is even more potential for a disaster than first thought.
The Tsunami research community has thoroughly debunked Simon Day’s claims about the size of a La Palma landslide tsunami on the East Coast. Unfortunately because it’s not what bad science documentary makers and the media want to hear, It’s not really been widely disseminated.
http://www.lapalma-tsunami.com/