I've recommended this before - you don't need a special/low power processor for that! Technically, any processor with a hardware video decoder will work fine a

I've recommended this before - you don't need a special/low power processor for that! Technically, any processor with a hardware video decoder will work fine as long as you limit the TDP to something your cooling can manage. Especially mobile processors. You can easily limit TDP on any major OS - now if you'd use some custom software, you'd need to implement it yourself, it's rather easy to do via MSR editing, Intel has their list of processor MSR's freely available.