Canon EOS REBEL T6i Instruction Manual page 235

Total Movie Recording Time and File Size Per Minute
Movie Recording Size
DC
L
B
[1920x
1080]
DC
w
FE Standard
[1280x
720] DC
x
DC Standard
[640x
DC
480]
Movie Files Exceeding 4 GB

Even if you shoot a movie exceeding 4 GB, you can keep shooting
without interruption.
During movie shooting, approx. 30 sec. before the movie reaches the
4 GB file size, the elapsed shooting time displayed in the movie
shooting screen will start blinking. If you keep shooting until the movie
file size exceeds 4 GB, a new movie file will be created automatically
and the elapsed shooting time or time code will stop blinking.
When you play back the movie, you will have to play each movie file
individually. Movie files cannot be played back automatically in
consecutive order. After the movie playback ends, select the next
movie to be played back.
Movie Shooting Time Limit

The maximum recording time of one movie clip is 29 min. 59 sec. If
the movie shooting time reaches 29 min. 59 sec., the movie shooting
will stop automatically. You can start shooting a movie again by
pressing the <A> button. (A new movie file starts being recorded.)
An increase of the camera's internal temperature may cause movie shooting
to stop before the maximum recording time shown in the table above
(p.253).
Total Recording Time on Card
4 GB
Standard 17 min.
Light 43 min.
20 min.
Light 2 hr. 5 min. 4 hr. 10 min. 8 hr. 20 min. 30 MB/min.
57 min.
Light 2 hr. 43 min. 5 hr. 26 min. 10 hr. 53 min. 23 MB/min.
3 Setting the Movie Recording Size
8 GB 16 GB
35 min. 1 hr. 10 min. 216 MB/min.
1 hr. 26 min. 2 hr. 53 min. 87 MB/min.
40 min. 1 hr. 21 min. 187 MB/min.
1 hr. 55 min. 3 hr. 50 min. 66 MB/min.
(Approx.)
File Size
235