Help with recording video over HDMI

I remember reading about one Doctor Who episode that only existed as a black & white telerecording (may well be the Planet of the Daleks episode mentioned), and they got it colourised by one of the companies that specialises in colourising old movies (who apparently struggled because they were used to working with proper filmed material, not telerecordings with the low resolution and other issues they have), but not long after the colour recovery process was developed, and I read about the people who had done the colourisation making the sets and costumes to be quite colourful, but then when they did colour recovery on it, the actual colours were actually quite dull and muted. I seem to remember the version that got released on DVD was a mixture of both the artificial colourisation and the colour recovered version.

That's correct! When the same episode was looked at again for Blu-ray, a year or two ago, it was newly restored using colour recovery only - the manual colourisation was dropped entirely. Shows how far the technology has come.

The computer colourisation was significantly helped by being done in 2007 when the pound to US dollar rate was extremely good (£1 = $2) - had it been just a couple of years later once the global recession hit then it would have been far more expensive and out of the DVD's budget.

Seem to recall that they did contact the colourisation company again a few years later regarding another episode, but the new price quote given was so ludicrously high it was seen as a possible deliberate pricing out as they didn't want to do it again after the troubles last time.

I did a small amount of manual colourisation a while back using rotoscoping and it was easier to hide misalignments with low-res SD footage. I wouldn't want to try it again with HD source material. Of course commercial companies doing it on any scale will have streamlined workflows, so it'd be interesting to know what issues they faced there.

Perhaps after the first learning experience, the second quote just reflected the true cost of doing it