The video is generally a fan-made animation or edit. It often falls into the category of "clickbait" or "troll" content designed to shock viewers or bypass platform filters.
The phrase appears to be a composite of several distinct online elements:
The search results for "piece: secret ss nita mp4" suggest that this query likely refers to a specific associated with the character from the game Brawl Stars . Search Findings
A "Brawler" known for her ability "Rupture" and her Super, "Overbearing," which summons a bear named Bruce.