The campaign editor has 2 separate buttons, one is an “include a youtube video” and one is an “include html code” button. Everything looks fine in the editor, but not in the sent email.
The youtube embedding is done via iframe, but it is well known that iframe gets removed from web-based email applications. This is an industry-wide known issue and can be circumnavigated. The bad thing here is that I believed this is a working feature, since it is there and I used it to send an email to 500 students, just to find out that the embedded video was not shown. The answer from the tech team was, that this feature does not work! Why is it included as an option then?
I then tried to include custom html via the “html code” button. I used code that worked on a different email provider (mailjet), the link to the video was received in the email. However, when I used the Ezycourse custom html code, something was done to modify that html code, as the link was removed again from the received email. I had professional help with this part, so I’m sure I didn’t make a mistake with this part. It’s the EC system that does something to the html code that is the issue.