Setting resolution for a single webpage asset

Hello!
can i use same logic to set window position and size?
According to UZBL Documentation
geometry: Geometry and position of the Uzbl window. Format is
widthxheight+x-offset+y-offset

I tried this way but I didn’t get success:
set geometry = 1280x740+0+0
In the execution of my videos I was able to change resolution and position by changing my viewer.py file in the following lines

  `  def view_video** (uri, duration):`

    logging.debug( **'Displaying video %s for %s '** , uri, duration)

    **if** arch **in** ( **'armv6l'** , **'armv7l'** ):

    player_args = [ **'omxplayer'** , **'--vol'** , **'-6000'** , uri]

    player_kwargs = { **'o'** : settings[ **'audio_output'** ], **'_bg'** : True, **'_ok_code'** : [0, 124], **'win'** : **'0 0 1280 720'** }

    **else** :

    player_args = [ **'mplayer'** , uri, **'-nosound'** ]

    player_kwargs = { **'_bg'** : True, **'_ok_code'** : [0, 124]}

I need the web pages to be the same size.

thank you!