Is the screen really 2K?

The listed resolution is 1920x1080, which is Full HD, not 2K. Confirm the panel resolution with the seller before buying if sharpness matters to you.

Is 32 GB of RAM overkill?

Not for heavy multitasking, large spreadsheets or virtual machines. For web browsing and documents, 16 GB would be plenty, but 32 GB keeps the machine useful for years.

Only lightly. The Core i5-1334U uses integrated graphics, so expect older and casual titles at low settings, not modern games at high frame rates.

Is the memory upgradeable?

DDR5 SO-DIMM slots in this class of Dell business laptop are usually accessible, but check the exact model's service manual. With 32 GB installed, upgrades are rarely needed.

Typically the laptop, a power adapter and paperwork. A stylus and docking station are usually sold separately, so confirm with the seller.

Is it good for video editing?

Basic cuts and short clips are fine. The U-series processor and integrated graphics make long 4K timelines slow compared with laptops that have a dedicated GPU.