Consider adding a video scrapper so that napari-animation could be used for animating gallery examples

[psobolewskiPhD]

🧰 Task

Here's what napari-animation has (also uses sphinx):
https://github.com/napari/napari-animation/blob/83eb7f6dcaff112a84e031481827649056a579fc/docs/conf.py#L166

See it in action:
https://napari.org/napari-animation/gallery/animate3D.html#sphx-glr-gallery-animate3d-py

And here's a recent example PR that made me think about this:
napari/napari#8461