You're not the only one. What you describe is actually hypothesized in the concept of the "uncanny valley effect":
"...as the appearance of a robot is made more human, some observers' emotional response to the robot becomes increasingly positive and empathetic, until it reaches a point beyond which the response quickly becomes strong revulsion. However, as the robot's appearance continues to become less distinguishable from a human being, the emotional response becomes positive once again and approaches human-to-human empathy levels.
"This area of repulsive response aroused by a robot with appearance and motion between a "barely human" and "fully human" entity is the uncanny valley. The name captures the idea that an almost human-looking robot seems overly "strange" to some human beings, produces a feeling of uncanniness, and thus fails to evoke the empathic response required for productive human–robot interaction."
I doubt that you are alone in your reaction, but the robots' appearance is driven more by function than by form. This dance exercise goes some way to redress the balance, with movements that are more fluid and graceful than the jerkiness typically displayed by robots. Yes, weird, and perhaps alien. But of course unnatural: nature has provided no precedent or template for robot designers to follow.
"...as the appearance of a robot is made more human, some observers' emotional response to the robot becomes increasingly positive and empathetic, until it reaches a point beyond which the response quickly becomes strong revulsion. However, as the robot's appearance continues to become less distinguishable from a human being, the emotional response becomes positive once again and approaches human-to-human empathy levels.
"This area of repulsive response aroused by a robot with appearance and motion between a "barely human" and "fully human" entity is the uncanny valley. The name captures the idea that an almost human-looking robot seems overly "strange" to some human beings, produces a feeling of uncanniness, and thus fails to evoke the empathic response required for productive human–robot interaction."
Source: https://en.wikipedia.org/wiki/Uncanny_valley