I think using the right tool is key to creating explainer videos (MP4’s) quickly, especially if creating videos isn’t your particular specialty. I don’t have time to focus on using Adobe tools like After Effects or Illustrator for explainer videos, although they are great tools! I use animation applications like Powtoon, CreateStudioPro, Camtasia, or Vyond to produce videos like your example rapidly. Articulate Storyline, Rise, or Presenter aren’t really designed to produce animated videos like your example, but could be used to produce a different type of engaging presentation.