I have no doubt that Martina Bárta is singing live, but I could as well have been listening to the studio version as it sounds just identical, which proves how good a singer she is.
She's wearing a golden suit of which the blazer has a deep cut. It might be just a little too much for this kind of subtle song. Some effort was clearly put on the staging. She begins sitting on the floor in the back and when she gets up it's like she walks over a golden carpet. Martina's alone on stage even though it doesn't always look like that as the led-screen show people standing like we saw in the video.
Even though there's not something specific for me that goes really wrong, it still doesn't convince me and it might be hard for the Czechs to improve their result from last year.