I definitely think camera tricks can be used to hide the fact that he’s just standing for most or part of the song. In the second rehearsal clip (from today) the camera panned up to his shoulders, and it looked as if he was dancing. They could experiment with camera movements around him as seen in the Ukraine NF (but to a lesser extent) and pan out to his legs/full body whenever he does a small shuffle or the backpack kid/flossing dance.
I really enjoy his energy and passion for doing his country proud. His music and style is fresh and a nice edition to the Eurovision catalogue and to the reputation of the contest as a whole.
Don’t give up hope, CZ friends! This one might do really well despite the set backs.