Ex-NBA Star Ben Gordon Made Video Threats Before Hospitalization

Ex-NBA star Ben Gordon was sending threatening videos to people in the days before a violent standoff with a woman in his NY gym ... TMZ Sports has learned.

FYI, Gordon was hospitalized for psychiatric evaluation over the weekend after cops responded to his business, Of Our Own -- a sports rehab and recovery center.

According to the police report, Gordon's girlfriend claimed Ben had locked her in the gym -- and was going berserk with a blade. Cops eventually went inside the gym, found Gordon in the bathroom and took him into custody. He was then transported to a nearby hospital.

But we know Ben's strange behavior has been going on for months -- he sent a video to several people he calls "bitch n*****" ... and dared them to "pull up" at his gym. He claims the men are wrongfully taking credit for launching the Of Our Own gym.