Dave Marks, who is the performer in this vid says "It's one looper - the Line 6 DL-4 Delay looper. It has a half time feature, which, if you record in on, can be used to double the tempo and raise the pitch by an octave."
The looper you have may not have the "half-time" feature.
California Bassists Club 2.718281828
Gallien-Krueger Club MarkBass Club #433