Actually, I already figured it out. Just Blogger doesn't accept my CSS code, for some reason. But it works on my own website. Thanks.

I think I should read you a little lecture about HTML programming . Use div tag with style- width:, height:, top:, left: and overflow:hidden. If you know a little html- you should understand what I mean!

How can I cut it so that it doesn't display the full page?

Yes, you can't use this iframe alone. You should use full page as a source of iframe. I mean /view/id-(number channel you want). For cutting- use style. That's all I can advise you.

I have tried that. It works first and next time when I try to open the channel instead of video there is white noise on the screen.

I think the best decision for you is using iframe and style tags. That's all I can suggest to you!

How about other channels that don't have changing HTML code? May I get those? I would really appreciate.

Hi! To my regret we can't do this. The reason- HTML code for this channel is changing constantly.

Hi. I would like to add the HBO channel on my website. Could you please give me the HTML code for it? Thanks.