Below are links to some amazing documentaries on different animal phylums and the Ecosystem Services they provide us humans. These videos were created by Millersville Biology Students for an Honor’s Zoology Seminar course here at Millersville University. These videos are for educational use only, but they still rock.
( I especially love the end of the Porifera Phylum video; time 7:10)
1) Arthropoda Phylum Video
https://www.youtube.com/watch?v=iLoEEF8fhAw&feature=youtu.be
2) Nematoda Phylum Video
https://www.youtube.com/watch?v=0E0JYwak4cM&feature=youtu.be
3) Cnidaria Phylum Video
https://www.youtube.com/watch?v=NaIeVVp-l8A&feature=youtu.be
4) Porifera Phylum Video
https://www.youtube.com/watch?v=KU2HTxI3MAw&feature=youtu.be