Back in the early 1990s, when the DSO's record length wasn't deep enough (unless one paid a fortune) I was also designing analog-TV baseband circuits.
To properly see the chroma burst and static pattern in the active video, one had to use an analog scope.
Not any scope, but one which had advanced TV triggering capabilities, i.e. trigger from a specific line. But the resulting display was very dim.
For that reason, Tektronix and other manufacturers also sold waveform monitors, which were specialized scopes for the purpose of viewing analog TV signals, see attached image.
Then Tektronix came out with the VM700, one of the first all-digital waveform monitor.
Ever since I first used the VM700 in perhaps 1995, I have never again used an analog scope.
We used waveform monitors for convenience, but never had any major dramas with triggering Tektronix CROs ----a bit fiddly, but you could usually see individual lines OK.
I must admit, I did cheat a bit from time to time by using a device called a "Link 330", which was primarily designed for doing diff gain/phase testing, but had a very nice trigger on individual lines.
When the Tek & HP reps would come in to show us their latest & greatest DSOs, we would immediately try to display one or, hopefully, two fields of video signal.
This was a standard test at transmitting sites, to check for "clamp pulse break through" in the field sync group, where the keyed clampers would sometimes miss-clamp on the pre & post equalising pulses.
Inevitably, the DSO display would disintegrate into what looked like my overgrown back yard, from aliasing due to the reduction in sample rate at long time/div settings.
That put my employers & me, personally, off DSOs for some time!
We did have a Tek THS 720A, which was reasonable for service work on Picture Monitors & the like, but if a beat up old analog was available, I used that instead.
Was the VM700 monitor the one with the touch screen?
We had a waveform monitor with such a screen, & I was trying to point out a "glitch" on blanking level to another Tech, so touched the screen where it was, as you normally do with conventional units, & the $&&$$/-/&)))!!! thing changed ranges!
I ran into a few DSOs in later jobs, but usually they weren't the newest devices, & there was aways an analog 'scope available as well, which I used due to familiarity & known performance.
Now I'm retired, I can't afford to buy a modern DSO anyway, & my Tek 7613 does all I need it to do.
Surprisingly, the analog storage function is quite good on this one, & if I really want a permanent record of a
waveform, a digital camera does the job.