Post, Pages and Categories

Hi guys,
I have a big favor to ask of you all. Please refer to https://www.anime-espada.com, https://www.animecrazy.net and https://www.animeseason.com.

Firstly, let us take a look at AnimeSeason. Just look at the first post in the middle. For example, when you click on “Watch Bleach Episode 193”, they will bring you to a video page without the pictures that appeared in the previous page. However, when I tried using the <!–more–> function, it took me to the video page, but with the pictures that appeared in the previous page. How do i remove the “summary with pictures” in the video page?

Secondly, let us take a look at AnimeCrazy. On the first page, there is a short introduction before the post. What is the short introduction? A post or a page? If it is a page, how do you combine a page and a post together?

Lastly, which is the most important aspect of this post. Categories. Let us take a look again at AnimeCrazy. Scroll down and click on one of the Anime Series or Shows on the side bar. Moving on, the site will bring you to a page where there are only titles of their individual post. I wanted to do like theirs, or better if possible. I tried doing it, but to no avail. Take a look at my site, Anime Espada, and go to Anime Index, Gundam 00 Second Season, and you will know what I mean. Not only the words appear, but as well as the video.

After hearing all my ‘complaints’, you should know how big my problem is. For the last aspect, which is the most important aspect, is it possible to do this way? Take a look at https://anime-espada.blogspot.com/2004/01/hakushaku-to-yousei.html. For example like, pages within pages. Okay that is so complicated. If pages within pages work, can you please please teach me how?

Another thing, I want to know how to hide pages. Are there any other ways than excluding its id? Because if the pages within pages work, I would have many of them and it will flood my header. Because if I were to add more pages, the titles of the pages that I created will be appearing at the header (Beside About).

Thank you very much!