Let's say you want to make a birthday video for your best friend John (love this guy)
First create a clappy, and call it "Birthday John" for instance. Then, share the invitation link to your friends so they can upload their wishes to John.
đź’ˇ Tips: if you create a clappy for "Just ahah!!", "Party" or "Gather Moments", every participant can upload unlimited videos. Otherwise, it's about one per person.