Add ability to start lecture and redirect to recorded content.

app/controllers/lecture_controller.rb

@@ -0,0 +1,14 @@
+class LectureController < ApplicationController
+  def start
+    lecture = Lecture.find(params[:id])
+
+    Toggl::start_time_entry(
+      description: lecture.title,
+      project_id: lecture.course.toggl_project,
+    )
+
+    if lecture.recording.present?
+      redirect_to lecture.recording.recording_url, allow_other_host: true
+    end
+  end
+end