Apologies. The website hosting the videos (created by a former partner) is down. I've messaged him to see if we can get the raw videos to replace those links. The other materials mentioned included a PDF, which was only a recreation of the blog post. Thanks for the heads-up on the broken links. If we can't get the original videos, we'll see about working on replacements.
In the meantime, put our Classroom — ERP Advanced: Power User Training on your professional development wish-list for 2019 (date TBA). This class covers scripting.