Canon EOS M50 Mark II Advanced User's Manual page 304

5.
Focus and record the movie.
Same as step 4 in
Caution
During movie recording, avoid changing the shutter speed, aperture value, or ISO
speed, which may record changes in the exposure or create more noise at high
ISO speeds.
When recording a movie of a moving subject, a shutter speed of approx. 1/25 sec.
to 1/125 sec. is recommended. The faster the shutter speed, the less smooth the
subject's movement will look.
Flickering shown on the screen when recording under fluorescent or LED lighting
may be recorded if you change the shutter speed.
Note
With ISO Auto, exposure compensation can be set in a range of ±3 stops (
To lock the ISO speed when ISO Auto is set, press the <
< > button again to cancel ISO speed locking.
If you press the <
level difference on the exposure level indicator compared to when the <
button was pressed.
Autoexposure Movie
> button and recompose the shot, you can see the exposure
304
Recording.
> button. Press the
).
>