Some transmission authorities included group delay pre-correction (pre-distortion) in their analogue TV transmitter specifications in order to counter the expected group delay distortion in typical domestic receivers. I think that originally, it was done at low-to-mid video frequencies for monochrome reception, with correction at higher video frequencies (around the colour subcarrier) in the colour era.
Commentary on the matter showed up in the CCIR/ITU-R TV System reports from 1974 Geneva onwards. I have attached a couple of examples – group delay curves are shown towards the end. (The whole set may be found at the ITU site.)
CCIR 1974 Geneva Report 624 TV Systems.pdf ITU-R BT.1701-1 200508 TV Systems.pdf
Evidently post-demodulation video group delay correction was sometimes included in higher performance receiving systems. I have attached a couple of examples, one with L-C and the other with SAW vision IF filtering.
BBC RC1-511 Block Schematic.pdf WW TV Tuner Block & Vision Schematics.pdf
Cheers,