Directv only playing in a corner of new LG OLED tv

What device are you using to view DirecTV? Are you satellite or streaming customer? Note that there's a separate forum for DirecTV Stream. 

I connect thru my Apple TV, but it is Direct TC stream

OK. You posted in the Satellite forum, not the DirecTV Stream forum. 

I'm guessing this is set on your Apple TV box. I'll move your post to the Stream forum. 

So I'll move your post to the DIRECTV stream section (instead of the satellite service section).

@lizdog911 Thank you for your contribution to our Community! Your efforts and compromise are appreciated. 

@Frustated_in_NYC We are here to help.

Let's make sure you follow up all the steps to Add the DIRECTV STREAM app to Apple TV

Please let us know how it goes. 

CatalinaC, DIRECTV STREAM Community Specialist

@Frustrated_in_NYC We're glad to read everything is working now, feel free to reach us back if further help is needed. 

Catalina, DIRECTV STREAM Community Specialist  

@litzdog911 this was the second time I'd seen "Your efforts and compromise are appreciated."  So, I tried Google Translate English -> Spanish -> English, and the result was "Your efforts and commitment are appreciated."

At least that makes sense.  Sometimes things get lost in translation; sometimes they get found!