The length of the video depends on the level of the course. 

Nicole’s teaching is clear and concise and her videos are not filled with fluff. 

In the earlier textbooks, most videos fall into the 5-8 minute range. The videos for higher level textbooks (Algebra 1, Algebra 2, etc) are a wee bit longer with an average of 10-15  minutes in length. And Advanced Math videos are closer to 20 minutes long.