Actually, that would be just about perfect - if the resistor was carbon composition. Patent #2891223 talks about making precision attenuators by grinding off carbon composition resistors to raise their value to get perfect values of attenuation and VSWR. It might also work for terminations. I got the patent number off of a Texscan attenuator that's rated for 1 GHz.
That may have been a good idea in 1954 when your options were wire wound or carbon comp, but these days film resistors provide superior characteristics.
Those Tee connectors are 75 ohms. The giveaway is the for video in the description they are aimed at the CCTV market.
Look at the side pictures. There is insulation around the conductors, looks like 50 Ohm to me. Or at least an attempt to get close. Compare to the pictures on
this page. And CCTV is sufficiently low frequency that almost any connector that works at DC is going to work.
I've pulled a 75 Ohm Tektronix through termination apart & found two parallel 150 Ohm axial resistors!
They probably figured that the TV/video people don't care about impedance matching anyhow, based on the great connectors they use (Belling-Lee, RCA) :p. I believe 75 Ohm BNC connectors are rated for significantly lower frequencies (somewhere under 2 GHz?) than 50 Ohm connectors, even with good hardware.
If I remember, at least for 50 Ohm, Tek had three different through terminators: a normal one good to 1 GHz, a 'high' power one good to 100 MHz or so, and a very accurate one designed for DC and audio frequencies.