Hi there, David!
Take a look at the “Lower Third” layer options. You’ll find 1) a “background” section which can be configured to display a media source (video or static image), and 2) a “background animation” which you can use to add basic movement (translation and rotation) to a media source.
If you choose this path, you can have your “Great job” animation displayed by itself if you empty the “Content” fields (title and subtitle) and set your logo to “None”.
Another option is to use a basic “Placer” layer and have your animation created so that it is displayed in the lower portion of the screen and choose a video format with an alpha channel to allow the top portion to remain transparent.
(A good mimoLive rule of thumb is to think about the Placer layer as a wildcard.)
Best,
Gustavo