Canon PowerShot V10 Vlog Camera (Black) - Manual (Page 63)

4K Movie Recording
Recording 4K movies requires a stable card with a fast writing speed. For details, see
Cards That Can Record Movies .
4K movie recording greatly increases the processing load, which may increase the
internal camera temperature faster or higher than for regular movies.
If a white
[ ] or red [ ] icon appears during movie recording, the card may be
hot, so stop recording the movie and let the camera cool down before removing
the card. (Do not remove the card immediately.)
Condensation may form inside the camera lens if you record 4K movies in [ Smooth
skin movie ] mode in humid environments.
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