Hi @brilliantlights, thanks for getting in touch. A good first step when videos are not showing, is to look at the browser console, I can see some file permission issues, access is being denied to those video hosted in amazon: https://cl.ly/281s3Q2o3l2J
I would check the permissions on the files and set those to public visibility. Also, if the videos are being served by https, then those will only show on the custom domain using ssl.
I hope this helps, let me know if any questions.