Is there shortly raw video
Unlikely due to the following reasons:
- The SD card writing speed is limited to ~21MB/s
- Nobody ever implemented raw video on point&shoots
- DIGIC 6 is changed considerably over previous generations, techniques which used to work on previous DIGICs may not be compatible
video with high bitrate with sx280/sx275/sx270
There are interesting debug strings in the firmware which relate to video compression, but I have bigger problems with this port (CHDK display performance, missing basic CHDK features, correct integration to existing CHDK code, ...). I did not look into video support yet.
People who can do research or development are very welcome...