IMO video on a camera is irrelevant, they are the wrong shape for filming (have you seen the rigs) and only good for filming from a static location.
High ISOs these are are irrelevant if they aren't usable, the majority of DSLRs (APS-C) on the market aren't usable beyond 6400, this will be less on a higher density sensor,
Neither Nikon or Canon have a four thirds system camera, it's only Olympus and Panasonic with sony joining in on the action, all brands that cover the consumer market (obviously Olympus cover the pro market too).