Any idea why most of my movies have no sound?

Got this from Sg group, apparently has 239 channels with 300 days access. It's like a lottery some boxes may work. Once it's installed go setting under player select mx player. Once done reboot the box and try if u are Lucky

Taiwan TV

https://my.pcloud.com/publink/show?code=XZy...a6AA0QW9Fi4T9yk

Tested the app.. For starters, it requires a lot of permissions, so that got me concerned.. But eh.. Go on.. After installing, it immediately hijacked the home button, wanting to act as the launcher.. Decline!... So launched the app, switched to MX Player and rebooted the device. Upon reboot, launched the app again. Here are my findings;
*Decent selection of channels and VOD..
*Ability to choose English as the main language and its really English.. 
*Tried VOD.. Went in and couldn't get out using the back button like normal.. Tried a few selections, didn't play.. Quit and relaunch.
*Tried 6 channels, all played but freeze less than 30 seconds later. Doesn't matter how many times I tried again or switching between HW/HW+/SW decoding in MX Player.. Same result.
*Switched to default player, rebooted. Even worse, only one channel played, but stopped less than 5 seconds in. After that.. all refused to play, even the one that played initially.

Final verdict: Didn't work on the Minix Neo U1 and even if it did.. Posed too much of a security risk.. Other safer options available.. Uninstalled! 

anyone know where can get mxq pro 4k  with 3000 channels ?   mind to recommend me reliable seller/shop to buy?