Ill sort below some of the videos I like, that give you a good insigth into making skis/boards.
How skis are made: https://www.youtube.com/watch?v=XNH78hkRZgo
All in one, great video: https://www.youtube.com/watch?v=1CGm5_3GsQA
https://www.youtube.com/watch?v=RYJUcknL9kg
Pneumatic press: https://www.youtube.com/watch?v=lnfaDaB-RmQ
Vacuum press: https://vimeo.com/32736678
Brokite making a kiteboard: https://www.youtube.com/watch?v=slCG7QO7lvg
If you are novel to ski or snowboard construction and design, here is a great series of videos explaining how these wonderful creations are made and what its all about. Enjoy!