add video player component
- bring together needs from #digitanz and system
- https://gitlab.rlp.net/motionbank/systems-frontend/issues/32
- https://gitlab.rlp.net/motionbank/systems-frontend/issues/26
- https://gitlab.rlp.net/motionbank/systems-frontend/issues/8
- motionbank/digitanz/frontend#16 (closed)
- motionbank/digitanz/frontend#78 (closed)
- motionbank/digitanz/frontend#33 (closed)
Edited by Jenett, Florian