Canon EOS Rebel T6i W Instruction Manual page 244

3 Shooting Video Snapshots
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].
• Changing the [Sound rec.] setting from [Auto]/[Manual] to [Disable]
or from [Disable] to [Auto]/[Manual].
• 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.
244