Roughly in the order I'd recommend consuming them.
Dave Thomas - Power of Erlang, Joy of Ruby - https://www.youtube.com/watch?v=lww1aZ-ldz0
Dave Thomas Elixirconf Keynote - Think Different- http://www.confreaks.com/videos/4119-elixirconf2014-opening-...
elixir-lang.org tutorial - http://elixir-lang.org/getting_started/1.html
Programming Elixir - https://pragprog.com/book/elixir/programming-elixir
Awesome Elixir - Curated list of great libraries - https://github.com/h4cc/awesome-elixir
Elixir In Action - http://www.manning.com/juric/
Learn You Some Erlang For Great Good - http://learnyousomeerlang.com/
Erlang and OTP In Action - http://www.manning.com/logan/
I haven't had a chance to read McCords new book, but having read his code and interacted with him a fair bit in #elixir-lang the last few months I can only assume I'll be adding it to the bottom of this list as an important intermediary step to becoming proficient in Elixir along with learning OTP.