Add link to video showing imaging step-by-step

[horner]

This video is really good at showing the steps to imagine the Rio 2

[horner]

That's odd, I'll update it. Does this work for you:

https://youtu.be/jvd-Pxaqy9I

[sciencewhiz]

Yes, that link works for me.

See this for how we embed videos: https://github.com/wpilibsuite/frc-docs/blob/01d4af7b098486bdf4ca2b388a575f6cf7c88906/source/docs/software/advanced-controls/system-identification/running-routine.rst?plain=1#L22