Is IGMP snooping on an IPTV only VLAN

I have CenturyLink IPTV here in Seattle and have setup a dedicated VLAN for the two set top boxes I have. Obviously there is only one port dedicated to that VLAN per switch (other than the trunk port of course). I've had IGMP snooping running on both my consumer grade switches for a while now but am wondering if it negatively impacts performance. Occasionally I'll get random block anomalies on screen or playback pauses. However, this isn't identically timed across both switches and set top boxes. In this setup is it necessary to run IGMP snooping or is it fine to turn off?

Thanks!

Edit: Failed to add "needed" to the end of the title. Oops.