In a PIM Sparse mode network, there is no initial flooding of the stream.
So, when a new receiver requests a multicast traffic, we could observe a slight delay while the PIM cache is being created in the switches. If the cache is already present, then there will not be any delay.
Sample cache output:
X460-24x.10 # sh pim cache 18.104.22.168
Index Dest Group Source InVlan Origin
 22.214.171.124 126.96.36.199 (S) CCTV Sparse
Expires after 186 secs UpstNbr: 0.0.0.0
RP: 188.8.131.52 via 184.108.40.206 in C2_E1S2
EgressIfList = C2_E1S2(155)(FW)(SM)(S)