Scroll through the home screen feed to see all types of short videos from the people you follow. Of course, you're going to see your share of pet videos, but there's a lot more out there as well.
Find people using a button from your profile page. From there you can search your address book, Twitter, or Facebook for friends who have the app, or you can search by name.
The menu button in the upper left lets you browse each area of Vine. There aren't a lot of buttons here or menus to drill through, just an easy jump among each function.
The way you shoot video (by touching then letting go for each individual clip) makes Vine the ideal tool for stop-motion movies. Just remember you only have 6 seconds maximum.