iPod4 wifi problem

Question

WiFi

Hello, I recently purchased an iPod4 and noticed that there are problems with Wi-Fi.
For example, finds a network, everything is fine. I enter the password, it connects. Indicates that there is Internet.
I'm trying to open something (browser, appstore, skype) starts to get stupid, and therefore gives an alert that there is no connection. True, sometimes, out of 100 attempts, it is possible to connect for a short time for a minute or two, then again it becomes dull.
Tried on several networks, iPhone and other non-apple devices connect well, there is Internet.

Googled, many have a similar problem, but there is no solution.
There is even a video on YouTube with the same problem www.youtube.com/watch?v=h9XrOGqUfxU

Can anyone come across? What could be the problem?

I reset the settings, rebooted, etc. - Does not help.

Answer 1

So in the same video there is a solution to the problem
youtu.be/G6Qno5zfJ94