CommentStreams:F3a46f7f35594d05b854cbe0432fae65
From The Lost Media Wiki
My friend claims to have seen this footage on a site around 2016/2017 and his description of it being dark, low quality and only a few seconds long seems to match up with the clip you described here. Now if what he says is true there’s a good chance that clip has been floating around for a good while now, albeit very rarely.