I have a commercial product that teaches music theory using a series of short videos. In an upcoming video, I'd like to give examples of particular theory concepts using several short snippets of popular music (~10 seconds each). The snippets would play a minor overall part in the lesson.
I have three questions.
1) Would this usage (several short snippets of licenced music) be considered "fair use" in a commercial, educational product?
2) Instead, if I were to record myself strumming the chords of that particular song snippet (~10 seconds), would it be fair use to use that recording in the video?
3) Is there any issue simply discussing the songwriting (e.g., chord progression or melody) of a piece of licenced music in the video?