Formdesigner is a very powerful form builder and recommend that you give it a try.
I like the ability to insert videos which can be displayed for lead generation and/or training purposes.
The conditional logic procedures are very easy to create and are color coded for even more clarity
Support has been very punctual and quick to point out the solution to my questions

I did run into a problem with the embed code not displaying properly, but soon learned that the java script code is the one to use
in most cases, and not the iframe code.
I creat multiple page forms with display perfectly on all devices including mobile.
I found that the list option for the pages was best in order to display a menu on the smaller screens when your form contains
multiple pages

The page tabs in the builder makes it easy to quickly see the elements included in each page.
Also, the section approach makes it easy to keep the elements properly aligned as well as being able to duplicate

Being able to upload numerous files in a form is practical and easy.

The HTML element offers flexibilty in displaying text, images and videos.

Once I got a handle on how to use the app, I find it easy to use and very flexible

This is a good deal right now on Appsumo, and allows for numerous integrations.