What is the best way to organize audio-video synchronization from PC to home devices?

Question

Computer networks

Given: two rooms.
Room 1: Desktop PC with Windows 10, separate TV and 2.1 speakers.
Room 2: TV and speakers 5.1.
Questions:
- How could any video be watched from a computer on both TV sets, incl. from an Internet (at the same time that for the second TV set the sound went to 5.1)? Without wires if possible.
- How to be able to run separately from the computer on 5.1 music? Also without wires.
Thank you.

Answer 1

First you need to do a good Google search for "DLNA" and "home media server".