Thought I'd post this as I couldn't find an answer on here. What I needed to do was to display an image located inside my WiX media manager inside an html element on the same site (it will probably work even if not on the same site).
Each of these images has an ID of the same length after a certain number of characters, and then has some noise after it, probably a filter of some sort. Here is the solution to get your image url and use it somewhere else:
'https://static.wixstatic.com/media/' + <your wix media manager url here>.slice(15, 51) + '/v1/fill/w_534,h_404,al_c,q_80,usm_0.66_1.00_0.01/Colorful%20Houses.jpg'
Hope it helps!