How can you make a simple video animation?

Question

Video

How can I make a simple video animation from scratch like this:
https://www.youtube.com/watch?v=9MDbt59rpAc
I would be glad to hear the opinion of people who have either done this, or seen / heard or took part in the process .
In total, I specify the questions:
1. What applications can be used to create such an animation?
2. Do you need any specific skills or can you figure it out from scratch? (I had no experience in this, I am a software developer).
3. Approximately how long does it take to create a simple animated video, let's say a minute long.
Thank you.

Answer 1

A simple one?)))
AHA-HA-HA!! ADINADINADIN
Yes, there is work not for a day or two, and not for one person. And if the character, then put out the light altogether. Quite unpretentious (much simpler than this one and on everything ready), you can rivet it in a day or two.
look for
Adobe After Effects - flat animation
Yes, do not forget that you need to write a normal script and it is very desirable to make a storyboard. Yes, visualization is important even for "such a simple video", otherwise you will either not get out of the process of creating a video at all, or you will end up with something far from what you want and from decent.