I watched the video for a while - and it looks almost identical to tmux - basically tmux with different key-mappings. I'd almost guess that the someone has sim

I watched the video for a while - and it looks almost identical to tmux - basically tmux with different key-mappings. I'd almost guess that the someone has simply gone and skinned the base tmux, everything looks so similar - panes, sessions, windows, resizing, scrollback, etc... If you already are familiar with tmux, I don't think Byobu will get you anything (based on what I saw of the video).