I have been using the 7.3.6a1 beta of VDH since it was released rather a long time ago. I've just updated to Firefox 67.0.1. I'm running Windows 7 64-bit. I do have a few green options.
- Main panel long lines: Over several lines - should be irrelevant here
- Icon activation: Hit from any tab - irrelevant
- Private notifications: not checked - not entirely sure what that affects, may have to do with locked variants
- File dialog, Alert dialog: Window - don't affect anything until you actually get into the file download step
- Tools menu: checked - irrelevant
- Download processor: CoApp - my personal recommendation
- Downloead directory: I doubt anybody has this set to the default unless they just don't know how to use VDH
- Several maximum settings - irrelevant
- Simultaneous converter operations - irrelevant
- Orphan expiration timeout - irrelevant
- Chunked manifests CoApp requests: checked - goes hand in hand with using the CoApp but I think it's irrelevant here
- Ignore protected variants: unchecked - extremely relevant here because I'm seeing now that ALL the offered variants are locked for those latest 2 videos. In fact, some of the videos that had unlocked variants the other day, including the Memorial Day one that I downloaded, now show ONLY locked variants.
So it seems like you should uncheck the one setting that is preventing the display of the locked variants. It would at least get VDH to display the variants that you can't download if only to reassure you that VDH is acting properly in NOT giving you anything you can download. Such is the state of affairs in the land of YouTube trying to defeat all downloaders other than their own. And I'm not too sure it would help either, although I can't say for sure since I don't have it. In fact, I've just gone back & checked some videos I downloaded from YouTube a year or longer ago & they now show only locked variants as well. Seems YouTube has seriously increased their activities meant to inconvenience their users as much as possible.