I wrote a Python script which will pull the json data from the Extra-Life website at regular intervals and generate two text files: one with donors names and donation amounts; the other with the total amount raised and fundraising goal. I read the text files into OBS using the "Text" source. In the attached example image you can see the the total donation amount below the webcam image, and the donors + donations to the right of the Extra-Life logo (I have it scrolling vertically).
This is meant for people who have some familiarity with Python. Feel free to use it "as is" or as a template for your own script, and no need to give me any credit anywhere.
I hope this helps, and good luck with your fundraising efforts!
Download Link: extra-life-json.py