Tim, AD4CJ gave a talk introducing a new use for the VARA HF protocol: the VarAC HF chat application created by by Irad Deutsch, 4Z1AC. The website for VarAC is: https://www.varac-hamradio.com and includes a list of features, the download for Windows, FAQs, user manuals and a community forum etc.
Tim then played a portion of the September 5th, 2022 Tonight @ 8 video from RSGB (Radio Society of Great Britain): Back to the keyboard! by Mike Richards, G4WNC. Mike gives an overview and examples of digital modes, required equipment and radio connections for keyboard QSOs and then walks through the features of VarAC and provides some operating tips for keyboard QSOs.
The complete video is well worth watching especially if you are new to digital modes:
or skip ahead to the section on VarAC with the embedded video below.
The VarAC portion of the video starts around the 29:45 mark: