A reason why DVD players don't have RF modulators

[Colly0410]

My DVD recorder/player RF output can be tuned to any UHF channel from 21 to 68 for older TV's. No English TV's made since 1969/70 were fitted with VHF tuners as VHF TV was phased out & we became a UHF only Country. Early video recorders were factory preset to channel 36 RF output as that has never been used for TV broadcasting, but you could adjust the output between channels 30 & 40 with a screwdriver, later ones could tune 21 to 68. Channels 35,36,37 & 38 were not used until the channel 5 network started broadcasting on ch 37 in 1997, then on ch 35 in 1998, this could cause adjacent channel interference & ch 5 had to send re-tuning engineers to affected areas FREE of charge to viewers. It cost them millions of pounds. Of course it's all digital now so problem no longer exists..