There is an understandable tendency, here and elsewhere, to call soccer misses such as this the "worst of all time." But by its very nature, any open net miss immediately trumps the former open net miss as the worst miss of all time. They're all, in their own unique ways, exceedingly awful. So we're comfortable enough with the label.
SportsPost tells us that the poor soul here is Anderson Fredrick, a player for a "low league" in Venezuela. For all we know, the clip might be years old, but this is the first we've seen of it — and anyway, it is currently dreadful to behold.