Using a VPN is always better for users, it gives you more privacy, protection from throttling, and access to content without geo-blocks. Especially with IPTV, it’s a smart extra layer, whether the service is legal or in a grey area.
username should be your email address.
clear browser cache, turn off ad blocker, if that does not help, try another browser.
you can also try to reset your password and set a new one.
Name of the channel: AT&T SportsNet Southwest Plus
Country: United States
Kind of channel: Sports
Lyngsat Link: https://www.lyngsat.com/tvchannels/us/ATandT-SportsNet-Southwest-Plus.html
Name of the channel: Vice TV
Country: USA
Kind of channel: documentaries, movies, and series
Lyngsat Link: https://www.lyngsat.com/tvchannels/us/Vice-TV-East.html
Samsungs app store is limited, better use an android box like Amazon fire tv. Ok Samsung you can try IPTV SMARTERS PRO or NANOMID player.
It might be helpful to reduce the bouquet list when TV's cache memory is limited.
fire tv runs with android, you can install APK files on it via DOWNLOADER (sideload) app. there are many apk sources in the www, also for this perfect player ;)