sharing a video in a meeting with approx 75 connected devices in dispersed locations

I would like to broadcast a movie that I own in my digital video library to a group with approximately 75 connected devices across dispersed locations. I have tried before but the people on the receiving end could not see or hear. I assumed it was a licensing issue, but reading on this forum I see it should be possible.  Please provide instructions so I can be sure it will work this time.