Blu Ray app crashing

Hey there mind if i jump in here!

As i am aware not all HDR / 4K supported movies work on the Xbox one S at the moment (Some bug out as you mentioned while others crash the Blu-ray app) first lets head over to the settings - Disc & Blu-ray - Blu-Ray - Persistent storage - Clear persistent
storage

As well double check if your settings are correct for full Blu-ray playback.

Yeah I'm having problems with my Blu Ray player as well. I don't have a 4K TV mind you, but I wanted to watch Wonder Woman on my Xbox at least. I have the 4K Blu Ray and non 4K Blu Ray. I tried both and whenever I inserted them, the Xbox began whirring,
and then the Blu Ray player App opens with it's opening screen, and then all of a sudden it crashes and takes me back to home. To top it off, the Youtube app crashes everytime I open it! AND to finish it off, I can't purchase anything, even after I took off
my billing info and put it back! Anyone help would be appreciated.

Try clearing the cache and then reinstall the app bro.
Put your finger on the start button of the console for 10 seconds until it goes out.
Then wait another 30 and turn it on again.
After trying this, reinstall the app.
It may work for you .

Ok try to delete the app, restart the console and download the app again.

To resolve this problem, eject the disc and restart the Xbox One console:

1. Eject the Blu-ray Disc from the console.
2. From Xbox Home, with Blu-ray in the big application tile, move the focus to the
   Blu-ray tile, and then press the Menu button
   on your controller.
3. Select Quit. If "Quit" is not available, the app is already closed.
   
4. Press the Xbox button
   to open the guide.
   Note Double-tapping the Xbox
   button will open the guide from any other screen on the console.
   
5. Select Settings.
6. Select Restart console.
7. Select Yes to confirm.
   Note If you're unable to access the guide or the console appears to be frozen, press and hold the
   Xbox button on the console for about 10 seconds until the console turns off. After the console shuts down, touch the
   Xbox button on the console again to restart.
   
8. After the console restarts, reinsert the Blu-ray Disc.