The appear.in block is part of Airtable Blocks, a Pro plan feature. Blocks let you extend the functionality of your bases: you can use blocks to bring new information into Airtable, visualize and summarize your records in colorful ways, and even directly integrate your Airtable bases with your favorite apps.
The appear.in block creates a button that everyone on your team can use to jump onto a group video chat. This block is similar to the Google Hangouts block, but unlike the Google Hangouts block, the appear.in block can be set to open directly inside the Airtable Blocks dashboard.
To set up the block, you need to specify the URL for your appear.in room. Then, decide whether you want the appear.in room to open inside your base's blocks dashboard, or open in a new window. By default, it will open inside your base, but you can just click the Open in a new window toggle to have the appear.in room open in a new window instead.
Once you've set up your appear.in block, you can click on the button to jump into the video chat.
If you're having trouble operating the appear.in room, you can look through appear.in's support library for further assistance.