Canon EOS M2 Instruction Manual page 197

Cautions for Shooting Video Snapshots

You can add to an album only video snapshots with the same duration
(approx. 2 sec., 4 sec., or 8 sec. each).

Note that if you do any of the following while shooting video snapshots, a new
album will be created for subsequent video snapshots.
• Changing the [Movie rec. size] (p.185).
• Changing the [Sound rec.] setting from [Auto/Manual] to [Disable] or from
[Disable] to [Auto/Manual] (p.201).
• Updating the firmware.

You cannot take still photos while shooting a video snapshot.

The shooting duration of a video snapshot is only approximate. Depending on
the frame rate, the shooting duration displayed during playback may not be
exact.
3 Shooting Video Snapshots
197