How to watch 360 youtube videos on iphone with Shinecon VR?

So i got Shinecon VR and i have the iPhone 6 S Plus, i downloaded the homido VR app and i can browse even normal non 360 youtube videos and watch them flat withouht 360, but the problem is that they are not in hd cause you can only watch youtube HD videos on the youtube app. When i watch 360 youtube videos with the browser of that app the quality is really poor, only when its flat its somewhat better. Most people say that theres a cardboard sign on the youtube app next to the full screen or on the video quality settings but there isnt any for me. I have tried updating and reinstalling the youtube app.So what am i doing wrong?

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