Instead of directly superimposing clear images of "alien space craft," people are now superimposing nearly invisible blurry images of "alien space craft" and fading them in and out. It almost had me for a second except the OP described it as a huge alien space craft.
Next, animals that almost seem to talk like humans. Someone was holding a conversation with his cat who seemed to respond with correct inflections in a cat dialect, but the acoustics didn't match and I detected a synthesized reverb effect. Some low-cost apps also have filthy pitch-change algorithms. I doubt the program used was Sound Forge.