Even if you could move another super massive black hole next to another super massive black hole close enough to distort the gravity well of the event horizon, to drop a tethered camera into the event horizon, you would have distorted where in space the event horizon actually is, and would need to go deeper. If you could properly suspend a ship(with out it tearing itself apart in such an extreme environment) between 2 black holes, and carefully navigate both their orbits, (as they too are moving objects)hang a long enough tether that is lets say more indestructible than the fictional adimantium, with a camera on end, and casually dipped it in for a look see beyond the event horizon. #1 it would start off so incredibly bright it would blind a camera, let alone a human eyeball. You gotta think it is absorbing so much material and splitting and fusing atoms together not to mention not letting light( photons which have zero mass) escape its gravity well to a point it creates an event horizon in the first place. All those photons are just as trapped as physical material that does have mass. It would be brighter than taking a human eyeball into the core of the sun where fusion acts. Billions of years of photons cascading inside never to leave would be the most brightest thing beyond your imagination. #2 Lets say we made our camera indestructible. After you proceeded down past the outer layer, i would imagine it to be like any star, the mass of material begins to coalesce into liquids and then solids and fusion continues on the inner layers until you reach the core, at which point the stupendously bright light and speed of which material almost nearly falls at 0.95% the speed of light and is evacuated again at 100% speed of light, the gear shifts in material exchange would boggle ones mind to the point that one couldn’t fathom the idea. But basically to peer through the event horizon of a black hole would be like looking at any other star. Granted that star is a million times the mass of our solar sun or more, but yeah. It would just be another star.

And that my friends is how you write a kurzgesagt video