While I wish that Meraki offers an option for this, I like the fact that it doesn't now in order to maintain security / data integrity. The way I see it, surveillance cameras with Meraki are not meant for web streaming. For that need, buy any of the cheaper web cams out there (Nest, Arlo, Amazon, etc)
Having said this, I would log a feature request where you can select a camera (or more), put it on a separate network, and configure this network with web stream access separate from your surveillance network.
Esteban J Nunez
School and Church
K-12 Education