You can do a "Speed Test" of your internet speed. I might think 15Mbps would be minimum requirement for home use??
TV: TCL 55" 4K UHD HDR w ROKU
DENON AVR-S910W, 7.2, HDMI 2.0a, 4K UHD HDR, Upscaling, Atmos, Wi-Fi, etc. 
KLIPSCH: L/R: R-51M - Ctr: RP-400C - Sub: R-100SW - POLK S-20 Surround
SPKR Wire:Windy City Wire - 16ga, 2 Cond, Twisted Pair, Shielded, Jacketed [USA]
HDMI: VANCO - 4K, 18Gbps, 2.0b, Certified --- [AT&T - Directv Sat. & DSL 100Mbps]