Idomoo saves video links after generation inside campaign members. To access those links in Salesforce using merge tags, you sometimes have to jump through hoops. For example, if you're designing an email template using the lightning experience email template designer you only have access to Contact and Lead fields, and therefore, you have to switch to Classic Email Templates.
Here's a short video showing this use case.

Watch the Idomoo for SalesForce AppExchange Demo

Total running time: 4:15