ffmpeg join / merge on top of each other

ffmpeg -i 2_Out_of_Control.VOB -aspect 16:9 \
-vf "yadif=0:-1:0,crop=w=714:h=476:x=6:y=0,scale=1280:720,boxblur=lp=13" \
-c:v libx264 -preset medium \
-c:a copy \
'2(blurred)Out_of_Control.mp4'

ffmpeg -i 2_Out_of_Control.VOB \
-vf "yadif=0:-1:0,crop=w=714:h=476:x=6:y=0,scale=1080:720" \
-c:v libx264 -preset medium \
-c:a copy \
'2(clear)Out_of_Control.mp4'