Syncplay.exe from extracted Syncplay download.
Ensure "Show more settings" is checked
Server address to:
syncplay.pl:8995 (or another server if your host tells you)
Default room to the name provided by your host.
Consider setting your
Username as well.
Browse for path to mpv media player (works the best)
mpv.exe in your extracted mpv folder you downloaded and set that to your
Path to media player.
For privacy, disable sending raw filename information. (Especially if following remote URLs)
File size information can also be disabled without major consequence.
Store configuration and run Syncplay
File -> Open Media File for locally downloaded files or
File -> Open media stream URL for remote files.
When you're ready to watch the video, indicate you're ready to start by clicking the
"I'm ready to watch!" button so the host knows that they may start the video.
You may send chat messages from mpv (even during fullscreen) by hitting
enter and typing your message and hitting
enter to send it.