The two videos below were how I presented my summer brief. It is best viewed on two monitors, simultaneously.

The easiest way to do this would be to use a video downloader or the amazing python script youtube-dl (§ pip3 download youtube-dl) and open them up using VLC.
With VLC open, press ctrl/cmd+shift+o, then tick the box that says something along the lines of “open another media synchronously…” and add the second video.
Another way would be to open the first video on your laptop and the other on your phone and press play at the same time.

Screen 1 – Landscape:

Screen 2 – Portrait