In the Brad Feld video just before 6:00 he positions his coaster, which the GF identifies as 2 pieces (the engrave and the cut). But both of those defined pieces move at the same time when he grabs and drags it.
So I am inclined to believe that the candle holder was multiple SVGs. The only other alternative is that by default all of the “parts” that the GF broke the coaster into were selected together, and if he wanted to Brad could have selected only the outline or only the engrave to move them individually. This is less likely since the highlight of those two options never changed while he was examining the cut/engrave settings of each individually.