Nowadays, yYoutube channels becomeis my main resource. Nowadays, Youtube is my main resource.

because you're using "nowadays", presently youtube "is" your main resource.

Nowadays, yYoutube channels have become my main resource. Nowadays, Youtube channels have become my main resource.

"Now, Youtube has become my main source of information for history." this makes it sound more natural

Nowadays, youtube channels have become my main resource. Nowadays, youtube channels have become my main resource.

I appreciate that books are more reliable than videos that I don't know who madewith questionable credibility. I appreciate that books are more reliable than videos with questionable credibility.

I appreciate the fact that books are more reliable than videos thatwhich are made by people I don't know who made. I appreciate the fact that books are more reliable than videos which are made by people I don't know.

However, the history channels isare full of attractive contents so that viewers won't get bored. However, the history channels are full of attractive contents so that viewers won't get bored.

However, the history channels isare full of attractive contents so that viewers won't get bored. However, the history channels are full of attractive content so that viewers won't get bored.

"However, the history channels make their content interesting for their viewers." this makes it sound more natural

However, tThe history channels is full of attractive, however, are full of stimulating contents so that viewers won't get bored. The history channels, however, are full of stimulating content so that viewers won't get bored.

Most people want to knowwatch interesting episodes or grasp big picture of history rather than know the exact figures and names. Most people want to watch interesting episodes or grasp big picture of history rather than know the exact figures and names.

usually "watching" episodes

Most people want to knowsee interesting episodes or grasp the big picture of history rather than know the exact figures and names. Most people want to see interesting episodes or grasp the big picture of history rather than know the exact figures and names.

Most people want to know about interesting episodbits and pieces or grasp the big picture of history rather than knowremember the exact figurnames and namdates. Most people want to know about interesting bits and pieces or grasp the big picture rather than remember the exact names and dates.

I reversed the order of figures and names because the next sentence gives examples in this order.

It doesn't matter who was the leader was of the rebellion or when it happened. It doesn't matter who the leader was of the rebellion or when it happened.

I have come to realize that books are not always truaccurate because it is hard to keep up with the latest research and exclude the authors' viewpointbiases. I have come to realize that books are not always accurate because it is hard to keep up with the latest research and exclude the authors' biases.

そうですね。

Regarding that point, youtube channels provide objectivehonest opinions in the comment by which we can determine if the information is reliable or not. Regarding that point, youtube channels provide honest opinions in the comment by which we can determine if the information is reliable or not.

opinions are seen as subjective, perhaps honest opinions?

Regarding that point, youtube channels provide objective opinions in the comments by which we can determine ifwhether the information is reliable or not. Regarding that point, youtube channels provide objective opinions in the comments by which we can determine whether the information is reliable or not.