I'd go with a UHF bowtie dipole. Those loops are shorts. 75ohm cable is transmission line. if you short transmission line and it is at the wrong fraction (or multiple of) the wave length of the transmitted signal then some or ALL of the transmitter signal power will not be transmitted but instead reflected back to the transmitter (which can damage some transmitters).
Also I'm leery of using matching transformers/baluns designed for receiving antennas...The transmitter power may be sufficient to damage them, and cause poor or NO performance.
I'm VHF exclusive right now, and this video has been my guide.
https://www.youtube.com/watch?v=z4dhRt7tmd4
I'd give it a try on VHF this way first, then start trying UHF if I were you....That video you posted is the first talk of using a BT mod for UHF that I've seen.