Canon EOS R6 Mark II Mirrorless Camera with 24-105mm f/4-7.1 Lens - Manual (Page 448)

HDMI RAW output
Set to [ On ] for RAW movie output at resolutions up to 4K from the HDMI terminal to
compatible devices.
As recording begins, the movies are also recorded to card [
] (if it is in the camera) in MP4
format.
You can restrict recording to external recording devices when card [
] is not inserted by
setting [ Rec Command ] to [ On ] ( ).
Set the movie recording quality in [ : Movie rec. size ] ( ).
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