I don't prefer to go to the Expo, but there are a lot of vids being posted on YouTube that have been part of Lightbox's offerings the last couple days. Simply going there, using "Lightbox" as a search term, and filtering the search results to "This Week" will render dozens & dozens of streams and webinars that have already been broadcast as well as a specific Lightbox channel.
I'm getting the impression that the biggest advantage to paying the dollar fee to the online Expo is to get access to the scheduled program of offerings that are participating all over the internet. On YouTube, at least, @xin-li those streams may stick around for a while on various accounts so watching them may not have a deadline.
Also, on Twitch, there are a plethora of Lightbox-oriented livestream recordings as well.
Please note that unrelated to Lightbox there are many many recordings of live streams on Behance, including some of the instructors from SVSLearn like Anna Daviscourt.
The challenge with all of these is that it's difficult to specifically curate what is useful to you in the context of what your goals are. Are you looking for children's book illustration recordings specifically about the industry? Character design as it relates to picture books? Technique or tool videos? How to assemble a book dummy? It should be noted that Lightbox and Schoolism are both balanced heavily toward the entertainment, animation, and gaming industries which indeed have a lot of overlap with children's illustration but also have some significantly major differences.
I personally find that in the vast sea of options, I gravitate toward the content created by specific artists with more kidlit-oriented styles (or at least my own developing understanding of kidlit style), as that methodology seems to help delineate content that is relevant to my own children's book illustration needs rather than watching content that ultimately isn't as applicable. For example, it's lovely to see highly detailed fantasy genre portraits being painted in action poses, or photo-bashed concept art of dramatically lit environments, or textured surfaces being rendered in 3D, but they're probably not going to be as pertinent to my own needs in an immediate sense. Watching a video on putting together a portfolio hosted by the heads of gaming studios probably isn't going to help one assemble a portfolio for the children's book industry. They're just not the same.
That may seem elementary. And I'm sorry if I sound too "teachery" or condescending--that's not my intent. But I vividly remember exploring my own interests in general illustration and not realizing there were differences. Once I found SVSLearn, I had to re-align many of my understandings about the illustration industry as my first exposures on the internet were to artists who were primarily creating work for gaming, animation, and movies. They were the easiest to find and I thought that's all there was. Examples of the worlds of editorial, kidlit, fine art, and licensing weren't as dazzling nor immediately findable as they weren't as popular. Much of the educational materials on the internet, and in most of the popular online schools, privilege design for industries most young people have immediate experience with--movies, games, and comics. I don't know whether I was just slow or stupid or naive or hadn't figured out yet what I wanted enough, but it took me a bit to understand there was a wider world of illustration options and styles than those immediately presented in front of me in search results.