How to embed a Youtube video into a campaign
Select 'Campaigns' from the menu. Then, select 'List' from the sub-menu. Choose the campaign you want to edit from the list, using the pencil icon on the right of the campaign name.
Once at the Campaign Wizard, click on 'Extended' section, then click 'Embed media from external sites' button.
A modal will appear. Paste the desired Youtube video URL in the field called 'URL'. Then click 'Ok' to place the video into the WYSIWYG.
Finally click on 'Save & Next' button to save your settings.