Yes, the games have LB IDs.
I just tried again. Same story. I Ctrl+A to select the games on the platform, then select to download Metadata and Media. Select only movies (all forms), and then select to replace all existing media, just to be sure.
I can see it "Searching for Video_MP4" and "Searching for Video_MP4_HI_QUAL". But nothing downloads.
Then, if I select a random game, right-click, and edit. Download meta-data, EmuMovies tab. I can see "Video - Gameplay (High Quality)" is checked by default among some other things. I can successfully download, and the game shows the video properly in Big Box. Most of the games still do not have videos.
This seems to be the only platform that I have this issue with. I can see that EmuMovies has the video packs listed on the site (in addition to being able to download one-at-a-time).