It’s common to see video of rocket stage separations. Rockets have video cameras installed in them so you can watch the separation. Engineers use the video footage to analyse how well the separation happened, and to discover any problems. It’s very useful in failed separations. But take a look at this video of a UP Aerospace launch for NASA to launch the Maraia Earth Return Capsule.
The following video focuses on the separation as viewed from outside the rocket. You can see slow motion, which is quite interesting.
I’ve never seen a stage separation from that angle before. What did you think?