Canon EOS M200 Advanced User's Manual page 487

The exposure changes during movie recording.
If you change the shutter speed or aperture during movie recording, the
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changes in the exposure may be recorded.
Recording a few test movies is recommended if you intend to perform
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zooming during movie recording. Zooming as you record movies may
cause exposure changes or lens sounds to be recorded, an uneven
audio level, or loss of focus.
The image flickers or horizontal stripes appear during movie
recording.
Flickering, horizontal stripes (noise), or irregular exposures can be
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caused by fluorescent lighting, LED lighting, or other light sources during
movie recording. Also, changes in the exposure (brightness) or color
tone may be recorded. In [M] mode, a slow shutter speed may reduce
the problem. The problem may be more noticeable in time-lapse movie
recording.
The subject looks distorted during movie recording.
If you move the camera to the left or right (panning) or shoot a moving
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subject, the image may look distorted. The problem may be more
noticeable in time-lapse movie recording.
I cannot take still photos during movie recording.
Still photos cannot be taken with the shooting mode switch set to <k>.
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Before taking still photos, set the switch to <z>, then select a shooting
mode for still photos.
Troubleshooting Guide
487