I'm into this YouTube channel called Peter Santenello right now.

adding "right" puts emphasis on the current of what you're referring to. Just having now is a little weird sounding for this sentence.

Peter mainly walks through mainly local towns by, chatting with local people, and comprehending what the place is like.

You don't walk through towns BY chatting with people. chatting with people is a method of walking. It's an AND thing

I found hisa video thatof his where he talked with an Armish guy.

"his video" kind of implies that it's the only one. "A video of his" just means it's a video by him, without making it sound like he has just one or many or anything. Also, we would use the word "where" when describing the contents of the video. "That" would be used to describe the nature of the video.

My fFavorite YoutTube cChannel

Title capitalization

I'm into this YouTube channel calledby Peter Santenello now.

We wouldn't refer to streaming channels as simply "Person's Name," we would call it their channel. E.g., "I'm really into Peter Santanello's YouTube channel now."

Peter mainly walks through mainly local towns byand chattings with local people, comprehendlearning what the place is like.

Comprehend is a little bit too heavy in this context

I found hisone video thatwhere he talked with an Armish guy.

Old me would think I couldn't imagine living that inconvenient of a life, but now I feel that the simple life is sovery beautiful.

You don’t have to care about what you look like, just ride along with it.

I would suggest: You don’t have to care about what you look like, you just live your life.
"Ride along with it" is more appropriately used when something *specific* is unfolding, and you don't fight against it.