Elixir: Power of Erlang @ YouTube
An nice presentation from Dave Thomas about Elixir, at rubyconf :-).
As similar as his Programming Elixir book, it is pretty much well organized. A nice introduction for the Elixir.
The future is functional
The future is concurrent
As discussed in the presentation (around 18:00), fibonacci definition is a good explanation of concise and declarative expression of Elixir.
I like this example.