I had my v8s come today, set it up easily, i noticed the webtv wasnt that great!
I have a paid subs with an iptv provider that i use with kodi, so the m3u8 link they gave me, i loaded up into windows VLC player, then saved it as a playlist, saved as Webtv.m3u.
Copied the file to usb stick
Menu-upgrade by usb
Mode-misc files
Select and upgrade
Choose webtv.m3u option
Press yellow
Exit
Reboot
Webtv with my personal iptv added like a treat.
Hope this helps