Does Ventoy write to "Track 0" on the UFD?

[bbertrand007]

1) During install, if MBR is chosen, does Ventoy write to the "hidden track 0" some boot code
2) Technically curious - how does Ventoy boot in BIOS mode?  Does the MBR pass control to a program in the VToyEFI partition and if so, is it the same program that Bootx64.efi passes control to in UEFI mode?