You could watch it with headphones plugged in, if they still work.
IIRC the only things you'll need to remove to re-connect the speaker cable are the keyboard (5 screws?) and the palmrest/touchpad, which only needs a fingernail and a credit card (or Spudger). The speakers are either a plug and socket which will only fit each other, or a ZIF ribbon cable. It's late here in the UK and I'm tired, which is why I'm not being overly specific or useful, but rest assured it's a pretty straightforward job and you could do it!