I have my Highsense TV behind Adguard home (local DNS).
Here's the list of major domains that i saw TV connecting to in the last 1 week. I haven't started blocking them yet, reviewing them for now, then I will start blocking.
mediaservices.[.]cdn-apple[.]com
nrdp-ipv6.prod.ftl[.]netflix[.]com
logs.netflix[.]com
recommend-ui-sa.vidaahub[.]com
layout-ui-sa.vidaahub[.]com
home-ui-sa.vidaahub[.]com
ota-tv.vidaahub[.]com
domain.vidaahub[.]com
device-ecom.vidaahub[.]com
pay-vidaa.vidaahub[.]com
partner.vidaahub[.]com
app-tv.vidaahub[.]com
vidaa-base-auth-sa.vidaahub[.]com
tvmodules-vidaa.vidaahub[.]com
geo-bas-sa.vidaahub[.]com
iot-voice-sa.vidaahub[.]com
hub-msg.vidaahub[.]com
params-msg-sa.vidaahub[.]com
ter-jrnl.vidaahub[.]com
cdn-0.nflximg[.]com
acr.unruly[.]co
hisense-0ba453d1.prod.partner.netflix[.]net