Ok here's one to file away.
It seems the 70D runs hot. And by that I mean I have yet to see anyone shoot 3200 ISO raw video for 30s without hot pixels (in rather significant numbers).
If one does the Canon "pixel remap" it only gets the pixels which are hot right away. It does not get those that appear after 30s.
Yet in video, and especially raw shooting, we want to remap after 30s or so (as that's when the most appear).
So to enable the 70D to shoot video at 3200 ISO, one needs to hack the pixel remap, so it can correct for the hots at 30s.
One would need to filter as to remove any 255 (RGB). Perhaps all one would need to do is click a picture after 30s, and
export to PS, and create a template that only has 255 RGB pixels on it. Then one would need to read that picture back in,
and use it during the pixel remap. ~ That's the best chance to get a proper pixel remap.
Or we could wait for Canon's next 70D update (and the tooth fairy to put a quarter under your pillow).
Ofcourse the do nothing arguement goes like this.
High ISO video/pictures have blocky shadows and weaker colour.
So even if you get a high ISO raw video, its colours are not as rich as low ISO.
The whole advantage of raw video, is richer colours.
So why not just shoot up to ISO 800 as a max. (which is about highest ISO with only a few hot pixels) for raw video to ensure your video has rich colours.
If you must shoot high ISO video shoot in H264 (flat pic style for higher DR) with higher bitrate (which gives slight better detail and contrast)
as comparable solution still providing blocky shadows and weaker colours.
