There was an 16mm film presented at my elementary school. It was a Martian documentary on their observation of Earth, circa late 60's probably. Never found it o

There was an 16mm film presented at my elementary school. It was a Martian documentary on their observation of Earth, circa late 60's probably. Never found it online. It marveled about the dominant lifeform there and all it created, consuming everything and expanding. It was highly diversified in size and color. It followed one lifeform to where it rested, and it disgorged "parasites", which from the fuzzy overhead view were humans and their dog staggering around in comparison to the elegant motion of the lifeform. It was pretty deep for a fourth grader.