Smart features in Veon 4K Android TVs??

I'm asking those who have the new Veon Android smart tvs, not the old ones.

Eg VPS55UHD running Android 4.4.4

I have some questions :

1. Can you play youtube at 4K

2. Can you get netflix at 4K

3. Can you play 5.1 sound mkv files from your home Windows network