The color seems fine, but the contrast may be overdone. It's dark. Not out-of-spec crushed dark, but dark nonetheless.
- clip1 is likely either EP or nth gen, or both. I see the beginning of tearing, chroma noise, and general noise the causes color loss or detail loss
- cliop2 looks to be SP VHS from a camera, and you can see the effects of either the camera, or over-contrast during capture, or both. The light cast onto the chair has no gradient, and jumps from harsh washout (white) to chair color. The kids all hair black hair. I'm not sure if it's okay or not. Hi8/Video tends to have higher contrast like this. Had it not been for the overscan noise, which Hi8 and Video8 usually don't have, I'd have guessed that format and not VHS.
- clip3 is the same as clip2, comment-wise. Note the roses on the table. They have an illegal value, as it's nothing both red chroma on top of white overexposure. Again, not sure if it's the camera or the capture work.
This is one reason why I usually process post-capture. Or use a hardware proc amp, as those aren't as hard as capture software proc amps. Realize this is all nitpicking. Overall, even given the issues, it's within acceptance.
Answers to your questions:
1.
Huffyuv compression varies on content. 35-40gb/hour is average. It's plausible to get everything from 25-50. Or maybe even 20-60. It's less concerned about the numbers, and more about quality compression (or lack thereof). It's lossless, so it does not compression the image in any way only the data stream.
2. Interlaced NTSC = x480, PAL = x576. Technically, yes, the interlace threshold is x288, so PAL can record interlaced 352x288, but the DVD players hate it, as it's out of spec non-standard. The usage of this setting is uncommon, but can be done based on needs. I almost never use it. If you capture x288, redo it.
3. The EP/nth VHS had some heavy green shifting, so you can see if capturing with color tweak on proc amp controls helps. If not, leave it alone. Just dial back the contrast some, be sure not to overdarken.
4. In
VirtualDub, sometimes 'preview' mode is needed, not 'overlay'. I'm really not sure why, and I've always found it random in behavior. It varies from system to system.
5. I want to update that guide. What are you trying to do?