CapnAvatar Checking the sandbox in addition to checking for new videos is standard procedure for me and might be something you want to periodically do going forward. If you haven't already tried, hiding the studio Fantastica will help you get a better idea of what's left (it's still a lot, but mostly older videos).
TouchMe, V1VR, PetersPrimoVR, TeppanVR, Hot Babes VR are a few others from the past year. Yet even if we knew which studios, it would be hard (from the studio page) to know which videos are in the sandbox right away compared to what's not. SodCreate has one in the sandbox, and trying to find that from the studio page would be a needle in the haystack.