The verdict

Plex
Intel QuickSync (UHD Gen12 iGPU) transcodes video; Intel AI Boost NPU (Core Ultra 100) is detection-only (no transcode).
Frigate
Intel QuickSync (UHD Gen12 iGPU) handles more cameras (~25 vs ~13).

Which wins for each job

Job Intel AI Boost NPU (Core Ultra 100) Intel QuickSync (UHD Gen12 iGPU)
Plex transcode none ~8 streams win
Frigate NVR ~13 cameras ~25 cameras win
Local LLM none none
Fits a mini-PC built into a CPU built into a CPU

Approximate - capacity estimates from curated specs, the same logic as the recommender. Verify against your exact setup. Prices move; check the retailer.

Full specs

Spec Intel AI Boost NPU (Core Ultra 100) Intel QuickSync (UHD Gen12 iGPU)
Price (list) - -
Type npu igpu
Interface built-in built-in
Transcode - H.264/HEVC 4K (AV1 decode)
Frigate detector OpenVINO OpenVINO
TOPS 11 -
VRAM (GB) - -
Low profile no no
GPU sharing - sr-iov
Power (W) 0 0