I'd do some investigating on wall mounts that have a wide range of motion. If you have a mount that will swivel enough you should be able to move it enough to view it from two areas, assuming they both face toward the television. Will this be coming off a wall or are you using some other kind of stand?

pls specify some details with wooden slides

Do you have any photos you can share? We do better with both floor plan and pix. I think the 9' area should be devoted to a library/reading nook with bookcases on the two walls and a comfy chair and floor lamp for reading. I see lots of doors but no windows in your space. The stretch of space from the entry to the balcony/gallery should be kept open for traffic flow, so Place the FP on the 7.5' wall to be seen upon entering. I think 'd try a sectional with two equal wings. Put the TV on the 7' wall between the two doors and float the sofa so one wing faces the FP and the other the TV. Use a credenza 25% wider than the TV rather than a TV stand. In the jog that has a 6' and a 4' wall, try a family game or chess table and stools. Be sure to get a big coffee table made of reclaimed wood so people can put their feet up on it.

https://www.houzz.in/ideabooks/111797176/thumbs/anindita Use this idea book. hope it helps/