The videos are really great. The animations are so easy to understand, they could have produced them without any sound, and they would still be internationally

The videos are really great. The animations are so easy to understand, they could have produced them without any sound, and they would still be internationally comprehensible. Also, without sound they could have reduced the pauses to at most half of their length. As of now, these pauses make the videos a bit boring to watch. But they should have used real videos instead of computer animations - that would have been even more convincing.