Hi Flavia,
The Veterinary Botanical Medical Association (VBMA) organized that webinar. They're at www.vbma.org. Right now, I don't know what's being planned next. They have a list you can subscribe to, so you can stay abreast of all developments. If they contact me for another one, I'll post it on the site here so you're aware of it. I'd at least contact them and put in a request.
All the best,
Steve