The videos are intentionally bizarre—talking animals, exploding fruit, and anthropomorphic viruses. That weirdness is the point. The amygdala (emotion/memory center) loves bizarre imagery, encoding the information deeply into long-term memory.
The Method of Loci dates back to Ancient Greece. The technique involves visualizing a familiar spatial environment (a "palace") and placing distinct, memorable items within that space to trigger recall. Sketchy Videos Microbiology