In Chrome right click on the page and select 'Inspect' then go to the Network tab at the top. Refresh the page, all the stuff from the page will load in, ignore this. Now click on the image and it will load the the larger version. Some more stuff will show up in the Network tab. One of the last things there will be the image or video. Double click it and Chrome will try to open it in a new tab, this will may just download directly to your Downloads folder or you'll have to save it manually. Not sure if this works if they're using the fancy DRM.