The correct way to record yourself for Dynamic Videos is by setting the "Face" method or mode as displayed here:

The first step towards recording your first videos is to click on the Sendspark Chrome extension icon. Doing that will open your camera's feed in a bubble on top of your background, just like this:

This recording method is set by default and it is the best way to record yourself along with your website. It is called "Both" and it can be changed from the bottom icons:

You'll notice that the option is darker than the rest, showing us that it is an active selection.

If you want to correctly record a Dynamic Video, the option needs to be set to "Face".

Recording a video in "Both" and using it in a Dynamic Video will provide an unwanted result: