I am not sure how redump VideoCD´s properly: as CD-i or VideoCD (only).

VideCD´s are according to whitebook and CD-i´s according to greenbook, so that implies difference.
However, when dumping a VideoCD, I noticed that at least two tracks are present and DIC makes at least two .bin files accordingly.
When the first is mounted in .e.g. IsoBuster, the content is something like what you see on a CD-i, so with CDI folder,
but also a MPGAV folder in which the missing AVSEQ01.DAT is located (it is actually in track2, so in the second .bin), plus a VCD folder.
Example:
https://www.zplace.net/Images/TearsForFearsTearsRollDownTrack1.jpg

So it actually is also a CD-i. What would be the best category to put in the redump post?

Dump HW: Plextor PX-755A ATA (+30), Plextor PX-W4012A USB (+98)
Burn HW: HL-DT-ST BD-RE BP40NS20 USB (+0), HL-DT-ST BD-RE BP GGW-H20L SATA (+0)
All Win 10

Good question. All VCDs have that CDI folder and are.multitrack. CD-i Digital Video is single track.

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If you can watch the disc with Media Player Classic - it's a Video CD smile