What collaborations has Ariel Gatoga been involved in related to Celtic mythology?

Based on the material I have in front of me, I do not see any specific documented collaborations I have done that are explicitly labeled as being about Celtic mythology with other creators or organizations. Most of what is visible here are my own lectures, live streams, and classes (like the vintage lectures and Thrilling Thursday lives).

It is certainly possible I have appeared in interviews, joint events, or projects that touched on Celtic themes, but they are not listed in the context you provided, so I do not want to invent details.

Are you asking about collaborations with other teachers/creators, or about how I weave Celtic material into my own solo work (lectures, courses, talismans, etc.)?