Expected Params to be Map - Phoenix 1.3

[ave....@gmail.com]

Learning Phoenix with the  Programming Phoenix Book

Mid way, chose to migrate my app to 1.3. Thus the conventions and file locations are slightly different, but i've been following along real well.

Stuck at trying to create Relationships ( Chapter 6). Trying to insert a video with an associated user. Relationships all setup correctly in respective Schemas

 In streaming.ex # a Context

 def create_video(attrs \\ %{}) do

   %Video{}

    |> video_changeset(attrs)

    |> Repo.insert()

  end

  defp video_changeset(%Video{} = video, attrs) do

    video

    |> cast(attrs, [:url, :title, :description])

    |> validate_required([:url, :title, :description])

  end

  In video_controller.ex 

  def create(conn, %{"video" => video_params}) do

    current_user = conn.assigns.current_user 

    changeset = 

    current_user

    |> build_assoc(:videos)

    |> Streaming.create_video() 

    

    #IEx.pry

    case changeset do

    

This gives me an error: 

expected params to be a map, got: `:videos`

I can as well refactor the code to follow the example in the Book, but would love to understand what i'm doing wrong here.

Thank You for any assistance.