It is nice if the movie shows a text label giving the plane number as it flips through. So here is a script that does that.
# Setup scene.
# For movie recording I would normally setup by hand and
# save a session instead of using commands.
windowsize 500 500
open 22910 from emdb
volume #1 style image level -0.4458,0 level 2.326,1 plane z,200
view orient
zoom 2
camera ortho
2dlabel text "plane number" xpos 0.8 ypos 0.1
# Record movie
movie record size 500,500
perframe "volume #1 plane z,$1 ; 2dlabel #2.1 text $1" range 80,343
wait 264
perframe "volume #1 plane z,$1 ; 2dlabel #2.1 text $1" range 343,80
wait 264
movie encode ~/Desktop/planes.mp4 quality high
Tom