First I enabled Cloud DDNS, in IP Services I had already configured with port 8291, I added a Filter Rules to 8291, and finally I tried to connect to an external network through WinBox using DDNS + Port.
It turns out that it does not indicate that it is not being able to log in, or that it is a wrong password, but that it is displaying “Logging in”, it can not log in locally.
None of those people here who can provide useful advice will lose their time on watching verbose and lengthy videos. Follow the hint in my automatic signature.
It was just a keyword to help you to find the whole signature on the page. Translate the whole signature into portuguese - it is an instruction how to safely publish your actual configuration for analysis. You need to open a text terminal window first (if you use Winbox or WebFig) or log in via ssh or telnet; then type
/export hide sensitive
then copy-paste the output of that command to a text editor and do the steps suggested in my signature (systematic IP address substitution). Then you can copy-paste the result here between [code] and [/code] tags.