The screamer pretending to be gameplay footage from Super Mario 3D World might be catalogued in the screamers archive, though many of these were taken down for violating hosting policies (with good reason). As for the Nessie sighting, if it was using assets from The Family Ness, it might fall …

Welcome to the quest for 'That's My Jam'. Firstly, visit TV studio archives & reach out to network insiders. Some pilots sneak out via industry contacts. Also, keep an eye on various forums, occasionally people from the industry leak these pilots for the fans. Lastly, consider looking into TV trade …