This work presents an Interleaving Slotted-PolyHarmonic-Staircase Broadcasting protocol. Suppose a video is transmitted using y·b bandwidth, where b is the consumption rate under normal playback conditions and y is a positive integer. In the proposed protocol, prior bandwidth (y−1)·b is divided into (h−c+1) channels with bandwidths b/c, b/(c+1),…,b/h, 2⩽c⩽h and ∑i=ch1/i⩽y-1<∑i=ch+11/i, in Harmonic sequence; each channel periodically broadcasts a segment in interleaving way only. The remaining bandwidth b will be partitioned into h+1 channels with the same bandwidth b/(h+1) to broadcast h+1 segments in interleaving staircase method. The maximum waiting time for the proposed protocol is (c+1/m)·L/(2h−c+2) where L is the time length of a video and m is a positive integer for interleaving. The buffer requirement is 25% of video size. Compared with Interleaving Harmonic-Staircase Broadcasting, the maximum waiting time is decreased by about 30%, under equivalent bandwidth and buffer requirements.