https://www.youtube.com/watch?v=kjBOesZCoqc {{youtube>fNk_zzaMoSs}} Vectors, what even are they? | Essence of linear algebra, chapter 1 {{youtube>k7RM-ot2NWY}} Linear combinations, span, and basis vectors | Essence of linear algebra, chapter 2 {{youtube>kYB8IZa5AuE}} Linear transformations and matrices | Essence of linear algebra, chapter 3 {{youtube>XkY2DOUCWMU}} Matrix multiplication as composition | Essence of linear algebra, chapter 4