Can Canon Micro m3 adjust aperture and shutter in video mode?

Of course. Canon m3 lowers the aperture and shutter in recording mode: Try the following:

Set the mode dial to the short film shooting mode, press the set button, select the short film shooting icon in the menu, then select the short film shooting icon with M in the upper right corner, and turn the dial to select the shutter speed; To set the aperture value and ISO, press the triangle up button to select the desired option, and then turn the dial to adjust. For more detailed instructions, please refer to page 87 of the electronic manual.

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