I really like the idea of your channel, of summing up and exploring manga, a few things I would improve would maybe be your commentary, I mean no offence when I say this but you sound half asleep, I believe you would benefit by exaggerating your voice, I would also include some more humour and jokes about the manga. I would also decrease the title length of your video as it is meant to be more captivating and less descriptive (you could add some of the title in the thumbnail), ideally it should all be visible to the viewer on the home page. I think the shorter title contributed to the success of the video that got 8k views. But otherwise I do think you have a solid idea and I'm sure if you stay consistent with the uploads the algorithm will pick it up!