Video unavailable. Watch on Youtube problem

I have a problem about Youtube iOS SDK (youtube-ios-player-helper). I am able to use it in my iOS native code now and it's working fine.

The problem is there are some videos which unable to watch on the application. The video iframe shows this:

Youtube video problem

Can anyone find any ways to pass through it? Or maybe is there any parameters for the search API which filter those kinds of video out of my results?

My search API is https://www.googleapis.com/youtube/v3/search?part=snippet&q=Mật vụ bóng đêm&maxResults=50&type=video with region VN.

Thanks a lot for your help.