Hi @Sevno, could you please send us more information on - firstname.lastname@example.org preferably with the no content email you received as well? We will have a look at it.
Once you submit your webcam form, it goes into assessment and it may take 1 - 2 working days.
Its quite simple, just start with the tutorials at api4.windy and copy the sample .html as it is into your own .html file. After that, put it on your web server, look at the resulting page and make changes as needed. I hope this helps you.
That site seems to be more oriented towards tourist interests than to Weather (which is the aim of Windy.com).
On a Weather site, these cams would rather make big noise instead providing pertinent Weather info...