Those videos are fake. The first one is just projecting a 2D image onto glass. The second is just video editing.
"An hologram is a 3D image result of the interference between 2 laser beams projected on the same object". Roughly translated from my physics book. (High school, not kids'). Unfortunately, it's only a brief explanation at the beginning of an exercise. So, the second one might be video editing, the first one I'm afraid not.
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