Describe the problem

In #7768 animation is being added to the plot_ecog example. @larsoner suggested that we add in the animation into the example. Currently, it's put together using matplotlib.animation, but seems like mne-python has other animation funcs (e.g. topomap), so I think it would be nice to have a "3D brain animate" function sitting in mne-python.

Describe your solution

A function similar to the topomap (https://mne.tools/dev/generated/mne.Evoked.html#mne.Evoked.animate_topomap) animate function should be possible.

I think a nice feature, would be a four view panel (saggital, coronal, axial and "custom"), where "custom" is looking at the activity from an optimally selected view that shows as many channels as possible on the surface of the brain. The other 3 views are traditional.

Describe possible alternatives

@larsoner suggested this might go into the 3D brain that @GuillaumeFavelier is developing? Not familiar w/ this, but happy to help where possible.

If the 3D brain is really nice... I would be interested in discussing how visualization of SEEG activity might look.

Additional context

See: #7768 (comment)