I was really excited to subscribe Sally's channel than I saw that her avg video length is 20 minute...,(reply>), noo, school just annoyingly getting in the way of you tube,(reply>), know what ya mean. My attention spa..ohhh!LOOK AT THAT!!!gotta go chase.. hey, guess what tv show's on now,(reply>), @Ronald de Rooij​​ sorry for hurting your feelings :) <br>I just watch YouTube in the break between classes to keep up with the stuff going on.,(reply>), He did not have the attention span to look well.,(reply>), so what? I watch science videos of 2 hours at a time, and sometimes even 2. Remember a lesson at school was 1 hour and a lecture at university was 2 hours long. Really if you do not have the attention span, you will never dig deep into things.