If you find the video, do not hit play to "see how bad it is." That validates the child’s curiosity. Instead, delete the cache and discuss why curiosity needs boundaries.
There is a subculture that treats unsanctioned fighting like a sport. They share these videos to analyze "who won" rather than worrying about the concussions or criminal charges involved. For them, "fightingkidscom" is a vintage archive. fightingkidscom video
Athletes should always wear regulation gear, including well-fitting wrestling singlets, headgear to prevent ear injuries, and wrestling shoes. Sanctioned Environments: If you find the video, do not hit play to "see how bad it is