Interesting Video! You start fairly simple: Pointing out how first normal looking humans join the crew, the further the story progresses the more monstrous the crew becomes. Like: Human then Reindeer then Cyborg (Franky) … Fishmen …
Later you start with the planetary system and how characters represent stellar bodies. (Here you could mention space travel is possible in OP with Enel & his connection to the moon haha)
Luffy - Sun, Shirahoshi - Neptune, Ju Peter - Jupiter, …
I like your systemic approach.
God Valley being a mirror of Yaya vanishing into the sky seems so obvious, but it never came to my mind.