Sorry; quite a bit of delay in my response, but unfortunately reducing the setup to a single monitor didn’t have an effect. I’d tried several things that had no effect, including:
1.) Running scripts that were built in the builder and manually coded
2.) Running the scripts in full window or a smaller window
3.) Running on a dual monitor or single monitor setup
4.) Resetting my PsychoPy Preferences
5.) Using older versions of PsychoPy
6.) Uninstalling and reinstalling PsychoPy
At one point, I shifted attention to something else and found that the script actually loaded after about 8 minutes but ran incredibly slow. This script is certainly computationally demanding, but even simple scripts are giving me an issue here. My setup should also be more than enough to run smoothly (Windows 10 Pro, 16gb RAM, 500gb SSD, i5-3470 CPU). So it seems the issue is really just something about my computer not meeting the computational demands of psychopy, despite it not demonstating issues with other demanding problems. This seems a little more manageable.
EDIT: I found several people with similar issues. I’ve switched to VlcVideoStim after coming across this post which solved my issue with getting it to work. I tried this suggestion to useFBO=False , but also did not have success. I also tried updating MoviePy based on this thread, but also no luck.