YouTube ID from URL in elixir

youtubeID.ex

  def get_youtube_id(youtube_url) do
    splitted_url = Regex.split(~r/(vi\/|v%3D|v=|\/v\/|youtu\.be\/|\/embed\/)/, youtube_url)

    case Enum.count(splitted_url) do
      1 ->
        Enum.at(splitted_url, 0)
      2 ->
        Regex.split(~r/[^0-9a-z_\-]/i, Enum.at(splitted_url, 1))
        |> Enum.at(0)
    end
  end

It's an elixir version of https://gist.github.com/takien/4077195#gistcomment-2184219