There are different signs for multiple meanings of the word 'stand'.
Definition: To have or maintain an upright position, supported by one's feet.
Four-legged animal standing.
Meaning: a stand that a camera, backdrop pole, or other rig sits on.
Pronunciation: The dominant handshape transforms from "S" into "3" (as the video doesn't clearly show the handshape "3").
Opposite signs: SIT.