Help with Facebook and webcast please [View all]

My HS class is having 50 year reunion.

For some reason, I was asked to see about what it would take

for classmates who couldn't make the trip to view the party and possibly have the party see them.

The facility has a large TV.

So what would it take (software and hardware) to make this happen?

The class has a Facebook page.

Thanks for any help.