Forgot to reply here. I haven't gone through 100% of the video, but the youtube video I linked shares almost the exact same steps >_< The only new and helpful information this paid tutorial has vs the free youtube one is to change the viewport shading to Random when you have multiple layered meshes.

Pros:

The video is very slow compared to the youtube one, so it'll be easy to pause when you need to see what key/menu they are using. (In youtube, I recommend pausing and using comma or period keys to move by frames). If you don't know Japanese, you can compare the UI placement at these parts. All keyboard shortcuts are universal. The parts newbies would need to study (sculpting, for example) are NOT sped up. You can take your time observing, and the language barrier for many shouldn't be too much of an issue during these parts. Has a version on booth with a Korean translation, if you speak it.

Cons:

There's quite a bit of silence and 0 editing done to those parts. No text document going over the steps or annotations like in the youtube video. The YT tutorial has a blog post, as well as on-screen subtitles you can use your phone to google translate into your native language. Almost no new techniques introduced in comparison to the free Youtube video (so far). The unity portions of the tutorial are kinda outdated now and might be difficult for those who struggle with the program. Big files, long videos that could be edited down to save viewer's time and disc space.

It hasn't been worth the effort of translating the audio into text so far when the youtube video already has associated text that can be machine translated. I am not an expert at blender or unity, but if there are questions on certain parts of EITHER tutorials I can try to help clarify! ❤ Sorry I didn't have great news to update with in regards to this specific booth file 😞