Ask HN: Should I let an agency promote our incredible orca video?

We filmed this orca video near Vancouver last week. Now an agency offered to promote it for us for a revenue split. Do you have any experience with this? How much can you make e.g. for 1 million views?

Or can it be successful without their help?

https://www.youtube.com/watch?v=APG-ksUPfXo