All I can say is, “broadcast quality” has always been a subjective term. Anything that meets the bare minimal specs for broadcast can be deemed broadcast quality.
Also, having no experience shooting with an adapter & hoping to figure it out on a paying gig calls for disaster. Even with someone who is experienced with them, there’s still a great deal of time setting up shots, adjusting, etc. Maybe your friend suggested it because the end product will look more “filmish” from the shallow DOF.
Good luck,
Bill