Noob questions I still ahve after research

[throwitdontshowit]

1) RAW is a video format, so I can have RAW+dual iso/hdr/regular video, correct? What extension are RAW video files saved as?

2) I was looking at ML support for mirrorless camera, waht does emulated mean (no hardware acceleration)?

3) I used the HDR workflow to get an output of frames, but how do I recombine these frames, and what happens to my sound?

4) How do I disable JPEGs from being created with every CR2 image I get?

[throwitdontshowit]

Also
5) what is 'emulated' as far as support, means no hardware acceleration?

6) on newer mirrorless camera, compared to a t3i, how did ML change, is shooting video easiier, is HDR completely gone nad replaced by better video options like dual iso by default?