Canon EOS 100D Instruction Manual page 202

3 Shooting Video Snapshots
Adding to Existing Album
You cannot select an album shot with another camera.
202
Select [Add to existing album].
1
Follow step 4 on page 198 to select
[Add to existing album], then press
<0>.
Select an existing album.
2
Press the <Y> <Z> keys to select
an existing album, then press <0>.
After confirming the dialog displayed,
select [OK] on the screen, then press
<0>.
Certain video snapshot settings will
change to match the existing album's
settings.
Press the <M> button to exit the
menu.
The video snapshot shooting screen
will appear.
Shoot the video snapshot.
3
Go to "Creating a Video Snapshot
Album" (p.199).