Introductory Part 1 by MDB is composed of 2 pieces:

Lesson 2, Part 1 .1 

Lesson 2, Part 1.2 

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Part 2 is composed of three videos by important scientists, followed by comments by your Prof. (two additional parts 2.2.1 and 2.2.2). 

VIDEO on early stages development in insects, by Eric Wieschaus (Nobel Prize  in Physiology or Medicine 1995):

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How Transcription facors work combinatorially in enhancers: VIDEO by Michael Levine 

<iframe width="560" height="315" src="https://www.youtube.com/embed/Cfgze3BItDY" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>

Why most genes are controlled by more than one enhancer: precision. by Michael Levine

<iframe width="560" height="315" src="https://www.youtube.com/embed/FLa3oRPxNLM" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>

Lesson 2.2 (two parts): commentary