> I would say that in average its around 90%.
> [...]
> Bitrate ::: 2612 Kbps
> [...]
> Resolution ::: 1280 x 544

Okay, that's not really 720p, despite the branding. 24% less pixels to decode. I think it's easily imaginable that in case of real 720p that video would need more than 100% of your CPU.

> This one used much lower cpu rate, I'd say average at 65%. The resolution is
> slightlyt higher that Predators, but it has a lower bitrate, so that probably explains it.
> [...]
> Bit rate : 2 029 Kbps
> Width : 1 280 pixels
> Height : 712 pixels

That's more or less 720p, yes. I really don't have a better explanation than you (bitrate) as to why that video causes rather small CPU workload.