The lines that cause pain later
Usage rights: organic post, paid ads, or both, and in which countries. Exclusivity: what you cannot say about competitors, and for how long. Whitelisting: them running ads from your handle. Revisions: how many rounds. Kill fees: if they cancel after you filmed. Payment date.
If a sentence gives them your content forever, worldwide, for any purpose, that is not a standard favor. Ask them to narrow it or pay for it. When the money is serious, have a lawyer read it. This page is not that lawyer.