Canon EOS 90D Advanced User's Manual page 290

Movie Recording Quality Settings
Frame Rate (fps: frame per second)
 [ 8 ] 59.94fps / [ 6 ] 29.97fps
For areas where the TV system is NTSC (North America, Japan, South
Korea, Mexico, etc.).
[ 7 ] 50.00fps / [ 5 ] 25.00fps

For areas where the TV system is PAL (Europe, Russia, China, Australia,
etc.).
Compression Method
[ X ] IPB (Standard)

Compresses multiple frames at a time effi ciently for recording.
[ ] IPB (Light)

Since the movie is recorded at a bit rate lower than with IPB (Standard),
the fi le size will be smaller than with IPB (Standard) and the playback
compatibility will be higher. This will make the possible recording time
longer than with IPB (Standard) (with a card having the same capacity).
Movie Recording Format
[ C ] MP4

All movies you shoot with the camera are recorded as movie fi les in MP4
format (fi le extension ".MP4").
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