Canon EOS 7D Mark II Basic Instruction Manual page 148

3 Setting the Movie Recording Size
24.00p
Records the movie at a frame rate of 24.00 fps. Applies to Full HD
quality.
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If [Enable] is set, the movie is recorded
in LBW or LBX.
If you have set [Movie rec. size] and
then set [24.00p] to [Enable], set the
[Movie rec. size] again.