I don't have data. I think the home made TV antenna in the video, is very
much like a bow tie,

Comparable to a 4 bay bowtie. Maybe 6db gain. Brazing rod would be a
little lighter and wouldn't rust. Would work much with a reflecting plane
and above the house clutter.

Twin lead could make a comeback since there won't be such a worry about the
low band interference issue. Actually much less loss than coax. I may yet
change over to 300 ohm window line on my bigazz deep fringe at 40ft and
switch it to the ham shack for 6/2m SSB work and DTV DX. TV DX won't be
dead, you will just have to know where to find it