My Japanese isn't perfect and I don't exactly have the time to watch a full Video right now, but I just stumbled across a Japanese YouTuber that seems to make actual long form gaming video essays in a similar style as Western YouTubers.
He seems to mainly focus on Nintendo related topics, but otherwise, the production value is good and he doesn't use a computer generated voice (I think).
That's the link to his channel いく(@ikugame):
https://youtube.com/@ikugame?si=39svLE_Kt-gj2pga
I watched parts of this video where he recommends some of his favourite Gamecube games:
https://youtu.be/wtapOaLHGzA?si=igPwsH0jZJ1DzyFk
by saywhaaaaaaaaatt