Canon EOS 70D Instruction Manual page 278

3 Shooting Video Snapshots
Shooting duration
278
3
Select [Album settings].
Select [Album settings], then press
<0>.
4 Select [Create a new album].
Select [Create a new album], then
press <0>.
5
Select the snapshot length.
Press <0> and use the <V> key to
select the snapshot's length, then
press <0>.
6
Select [OK].
Select [OK], then press <0>.
Press the <M> button to exit the
menu.
A blue bar will appear to indicate the
snapshot length.
Go to "Creating a Video Snapshot
Album" (p.279).