To ingest media files you have to use the FTP client software like FileZilla, Windows Explorer, command line ftp utility or any other. Connect to the FTP server address ftp://ftp.cloudycdn.services/ with your username and password. You need FTP permissions to access FTP account.
Other alternative is to use the API Media - Ingest action.
FTP username and password
Due to FTP account limitations your username for FTP is slightly different than the username for Cloudy CDN web portal. It retains the same user e-mail structure but all dots ('.') and '@' symbols are replaced by underscores ('_'). For instance if your portal username is firstname.lastname@example.org then your ftp username is name_surname_domain_com. You FTP password may be different from the password for the Cloudy CDN web portal. You can change the FTP password in the portal by clicking your name on the top right corner and choosing Change Password from the menu. Make sure which tab you are changing your password in as both the user and FTP password is in the same popup window.
To embed a video in your site click on media name to open edit on right side. Then click on Embed code tab and in bottom you will find a Embed code field - copy your embed code and paste it in your site where you want to show video.
In chapter 3.4. Media you will find the description of typical workflows which you most likely will perform in "Media" section.