"Attack of the Giant Vulture" is a short film that appeared on Nickelodeon's "Short Films by Short People" series; a show that showcased short films made by kids. It aired a few times in the late 90s-early 2000s, but has never shown up online.
The short involves a giant vulture chasing a group of kids, culminating with them cooking and eating the bird. Some report that it was particularly frightening for them as children.
The Paley Center for Media in California are the only people/organisation confirmed to have a copy of Nickelodeon's "Creative Lab Comp Reel", a 1:17 hour tape containing the infamous Vulture short.The only footage of the short available online are a few snippets seen in a promo video found on YouTube.