As you wish: https://youtu.be/49kv_E9XjpY

Script here: https://github.com/talonvoice/examples/blob/master/vlc.py

Alternate minimal script:

   from talon.voice import Context, Key
   ctx = Context('vlc', bundle='org.videolan.vlc')
   ctx.keymap({'video (pause | play)': Key('space')})