I’m using an ASUS NUC 14 Essential Kit N355. It’s a bit more expensive than the Pi 5, but also more powerful (8 cores and decent GPU). There is also a more affordable N150 model. And even lower budget are the N150 mini PCs from Chinese manufacturers, but they often mess up things like cooling in a hardware revision (compared to the favorable review that you’d read).
And forgot to mention this before: Intel CPUs with built-in GPUs have very performant and energy efficient hardware video codecs, whereas the Raspberry Pi 5 is limited and lacks software support.
I get 3-5W, mostly 4W on my N100 nuc. WiFi disabled through bios. And I ran powertop and made the suggested changes. 1 stick of 16gib lpDDR5, 1 nvme ssd, 1 4TB SATA ssd. Under full cpu load usage goes up to 8-12W. When also the gpu is busy with encoding the consumption grows to 20-24W. This is with turbo clock enabled. With it disabled power draw stays around 4W, but it is annoyingly slow I enabled turbo again and just content with the odd power peak.
And forgot to mention this before: Intel CPUs with built-in GPUs have very performant and energy efficient hardware video codecs, whereas the Raspberry Pi 5 is limited and lacks software support.