I am using Youtube Data API in my app & play some videos in my app. I also added some Text for app user to read. But all of this i get rejected & they give me the bellow message.
Guideline 4.2.2 - Design - Minimum Functionality
We noticed that your app only includes links, images, or content aggregated from the Internet with limited or no native iOS functionality. We understand that this content may be curated from the web specifically for your users, but since it does not sufficiently differ from a mobile web browsing experience, it is not appropriate for the App Store.
Your app is too simple for it to be accepted.
Maybe the website you are showing is so big and great! but in terms of iOS all you did is showed a UIWebview. So if the user entered the site using safari it is the same. Thus it is not worth to be on the app store.
My advice, build notifications, have some features in your app make it look big. This will get it accepted.
Hope this helps!