Chromecast does not connect (Resolved Part 1)

If you're having trouble with Chromecast this tutorial can help.
See how you can resolve issues with the Chromecast connection.
If it doesn't solve your problem here in this tutorial, see part 2 of the tutorial that will definitely solve it. Do not include in this video to not be too long because the final solution is a little more complicated to do, but if you've tried everything the solution can be in the next video.
Chromecast does not connect to Wi-Fi (Resolved Part 2)
https://youtu.be/dCcFGVpVFbw