You don't need a special license for your animation. But you do need to check the licensing of any content that you use. The stuff that comes with poser is ok. The stuff bought in the market place is usually ok. Freebies gotten here or elsewhere may have restrictions on them. Most places will tell you if something is ok for commercial use or not. Otherwise, check the readme file. It should say.

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Available on Amazon for the Kindle E-Reader Monster of the North and The Shimmering Mage

Today I break my own personal record for the number of days for being alive.
Check out my store here or my free stuff here
I use Poser 13 and win 10