Canon EOS M200 Advanced User's Manual page 241

k Auto slow shutter
z
Disable
Enables you to record movies with smoother, more natural movement,
less affected by subject shake than when set to [Enable]. Note that
under low light, movies may be darker than when set to [Enable].
Enable
Enables you to record brighter movies than when set to [Disable] by
automatically reducing the shutter speed to 1/30 sec. (NTSC) or 1/25
sec. (PAL) under low light.
Setting to [Disable] is recommended when recording moving subjects under
z
low light, or when afterimages such as trails may occur.
You can choose whether to record movies
that are brighter than when set to [Disable]
by automatically slowing the shutter speed
under low light.
Applies when the frame rate of the movie
recording size is 8 or 7.
Other Menu Functions
241