Thank you, Bingo!
I edit a still shot in photoshop - here to insert Max - and then upload to Kling where I gave it simple instructions (“blue creature gesticulates”).
Another use I’m exploring is simply to have a scene last a couple second longer (like reaction shots) because so many shots in Phantom Menace are cut tightly which makes makes it difficult to rearrange without it feeling choppy.
Basic advice on Kling is [describe what the subject is doing] + [camera motion].
Another scene I want to do is Anakin jumping through the window after Zam has taken at shot at Padme. Here is more of an idea of the promises and limitations. Once I get around to paying $ I can experiment more and not have the watermark.