Can I use Dropbox to store my videos?

Dropbox is NOT really suitable for live streaming of video files - we strongly recommend you invest in something like Amazon AWS S3 which is very economical and a very satisfactory solution.

PageDyno: You can use the share link option in Dropbox for the images and videos - see below for the changes to the URL that need to be made

To insert a video stored on Dropbox into your page or player, you need to change the URL that Dropbox gives for the share:
At the end of the URL, replace  ?dl=0 with  ?raw=1

EG:
Dropbox Share URL:  https://www.dropbox.com/s/drhayyfvjg/Gorilla.mp4?dl=0
Change URL to:         https://www.dropbox.com/s/drhayyfvjg/Gorilla.mp4?raw=1