To quote you:

Do you know how YouTube embeds work?

This site summarizes videos regardless of their status on YouTube. Don't support embeds? Tough luck, this site will summarize your work either way and there's just a little box telling you that you could watch the video on YouTube.

This site exists to take the work of others. If not, please provide a link to the YouTube channel made by the person behind stepify and all their videos.

> Don't support embeds? Tough luck, this site will summarize your work either way

Again wrong - the creator can disable embeds for any video on their YouTube dashboard.

And this website ignores them. It will still summarize your video but won’t provide your profile icon or video title.

Have any proof for this claim?

How do you know it doesn't fail to publish a page when there's no video available?

^ Just curious where you got the info. Beyond that:

Being publicly available on YouTube would still mean it is allowed to be summarized by another person. This restriction you speak of has never existed in any copyright law.

I tried it with a video I have set to not allow embedding.

Summary just like any other video but just the standard box when embedding is disabled.

You should try it for yourself with one of your own YouTube videos from your own channel.

Can you link it? I'm just curious how it presents it. I agree it should share the source even if they can't create the embed.

I don’t have the link anymore. I’m on another machine now so don’t have access to the browser history.

But there’s lots of no embed videos on YouTube. You can also just try it with one of your own videos.