What is mood, really?

Is a mood just that feeling in the background, or does it even exist?

00:00 Introduction
01:00 The regular idea of mood
01:53 How does one experience a mood?
02:34 Physical feelings
06:13 Mental feelings
07:17 Thought
10:11 A different definition of mood
14:47 We are doing a mood
15:36 The true meaning of a thought
16:32 What you can do
16:53 Stopping the pattern of negativity
17:44 Gratitude