I have the Echo Show 10.1" Version and it is connected via 5Ghz WiFi. It works extremely well when streaming Hulu Live using voice commands. Hulu Live has a native "SKILL". I do not understand why streaming from Channels DVR using MPEG4 would be an issue. Would love to see a Channels "SKILL". There are a lot these devices to market too. We use them mainly at our 2 desks and Kitchen and Master Bath.
Dual-band, dual-antenna Wi-Fi (MIMO) for faster streaming and fewer dropped connections than standard Wi-Fi. Supports 802.11a/b/g/n/ac Wi-Fi networks. Does not support connecting to ad-hoc (or peer-to-peer) Wi-Fi networks. Also includes an 802.15.4 radio for support of smart home devices.
Echo 5 & 8 have this: Wi-Fi connectivity
Dual-band Wi-Fi supports 802.11a/b/g/n/ac Wi-Fi networks.