In early 2018 I bought a smart tv (Mi LED TV 4A) for my parents. I see no third party apps installed on it. My parents told me the TV had issues a years back and guys who fixed told them the motherboard was changed since it wasn't able to boot-up. I wanted to try out some OTT apps but since it has no play store I am just not able to install any apps. I tried installing via USB, apps get installed but either crash or don't work.
The only apps that seem to work on it, gets installed automatically without any hassle is what's comes in its feed. Like amazon videos comes in its feed and if you click on it, Amazon Video gets installed automatically and works fine. But how do I install other apps I want like YouTube on it?
What am I missing here?