Keywords: itself, herself, himself, themselves, independently

Found 2 variants for this sign (click on video to enlarge):

Sign Definition

As a Pointing Sign

1. Before a verb it means the person or thing being talked about does the action alone. After a verb it means that the person or thing being talked about is alone responsible for the action (it is done without any help), or it means the action was done by the person or thing being talked about to the person or thing being talked about, not by anyone or anything else. English = itself (thing), himself (male), herself (female), independently.
2. If the pointing hand sweeps sideways before the hand flicks open, it can mean "themselves".

As Modifier

1. Used immediately next to a verb to mean the action is done by someone or something separately from other people, groups, or things. English = independently.