What is the name of platform/software used to build such drawing type videos(first saw it used by academind(https://www.youtube.com/c/Academind/videos).)
I
.com/yNMN1.png
This can be done in Microsoft Powerpoint using slide animations. If you don't have Powerpoint, use Google Slides, it works similarly.
You can use Prezi.com or Different cool online tools are available
or you can do anything in the Microsoft office 2010