Canon EOS RP Advanced User Guide - Page 571

Troubleshooting Movie recording stops by itself. zz If the card's writing speed is slow, movie recording may stop automatically. For cards that can record movies, see =585. To find out the card's writing speed, refer to the card manufacturer's website, etc. zz If you shoot a movie for 29 min. 59 sec., the movie recording will stop automatically. The ISO speed cannot be set for movie recording. zz In shooting modes other than [M], the ISO speed is set automatically. In [M] mode, you can manually set the ISO speed (=589). ISO 100 cannot be set or ISO speed expansion cannot be selected during movie recording. zz Check the [ISO speed range] and [Range for H] setting under [z: kISO speed settings]. zz When [z: Highlight tone priority] is set to [Enable], the available ISO speed range starts at ISO 200. Expanded ISO speed cannot be selected even if you set an expanded range for [ISO speed range] or [Range for H] under [z: kISO speed settings]. When [z: Highlight tone priority] is set to [Disable] (=137), you can set ISO 100/125/160 or an expanded ISO speed. 571