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It sounds like you're looking for Wattpad (https://www.wattpad.com/home) I don't use the platform myself, but for what I can see, it allows you to upload chapters of your book up to the full book, ...
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#3: Attribution notice added
Source: https://writers.stackexchange.com/a/30678 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/
#2: Initial revision
It sounds like you're looking for Wattpad ([https://www.wattpad.com/home](https://www.wattpad.com/home)) I don't use the platform myself, but for what I can see, it allows you to upload chapters of your book up to the full book, give a cover and some metadata, and share it with the community. Everybody can read your text and comment snippets of it, creating engagement with the community members - this I believe is the nicest feature. You can browse books by genre, and see statistics for each one (reads, likes, lists in which it's included, etc.) Every language has its own community, so you can easily share your book to the specific audience of your language. It's not english-only. Sometimes you read articles in the newspapers about writers who signed deals with publishers after receiving many views on Wattpad, so this gives some promotional push to the website. Reading your question, I believe that is as close as you can get to something like YouTube.