Why does my animation not play in the editor, nor with an animation controller?

Note that this is a non-human animation, although it was animated with the roblox animation plug-in and thus functions the same. It is my first time making an animation like this.

I was able to rotate and move stuff in the editor, just when I clicked on "play", it never played, nor did it work in game with an animation controller. The model has body parts welded to a body part, everything is unanchored except the HumanoidRootPart.

Anyone know why this doesn't play?

https://gyazo.com/53eb7881dac2f7c8572eb782106c2a9b https://gyazo.com/7eedd95f4894fb4337a6838a199d2d30 https://gyazo.com/df8c3792578793c94d9d3ed8a270bde6