We mainly know the great film-makers from their long-length features and we ignore other shorter creations of them. This is one good example. Tezuka parodies here human memory, while giving a quick lesson of cognitive psychology, one might dare say. His style in this short film mingles real people faces with 2D animation, perhaps with the intention of adding a caricature feeling to it. It makes me wonder, if Yuasa Masaaki is influenced directly from Tezuka.
Let's take a look at the qualities of memory Tezuka mentions in the short:
Memory is based on oblivion. If we couldn't forget ,then we couldn't remember either. The useless details are erased.
Memories are organized inside the brain. We remember what leaves strong impressions.
Memory is selective and distorting and idolizing.
Memories are influenced by emotions and influence emotions. Bad memories either get pushed away or get magnified.
Time soothes and minimizes the effect of memories and memories wear off.