Slack is a proprietary business communication platform developed by American software company Slack Technologies. Slack offers many IRC-style features, including persistent chat rooms organized by topic, private groups, and direct messaging.
Assuming you already have a Twitter account integrated into Zapier and your VAP Trigger is setup it is simple enough to get your Zap setup.
Authorize Step 1
Authorize Step 2
Choose App and Event
As you go to test your Zap it is important to understand that there is an Anti-Spam filter in place.
What this means is a Phone Number will only trigger one time when entered into your opt-in box.
So if you wish to test your Zap more than once you will need to either use different phone numbers to enter into Opt-In Box or set up a different Video Project to test with.