When you submit a Spotlight comment, the first name of your Display Name will be visible to the public. If you’re Snapchat friends with the Creator, they will be able to see your full Display Name.
When will my comment be visible to the public?
Creators will have to approve your comment before it shows up in the 'Comments' section of a Spotlight video. Once you submit a comment, it will show a "Pending" status, which means it's not live yet. If the Creator approves your comment, the "Pending" status will disappear and your comment will be visible to the public.
To delete a comment you have submitted, you can press and hold on the comment, then tap 'Delete Comment'.