Here is the full list of all 10 Twitch achievements worth 0 gamerscore. It takes around 100-120 hours to unlock all of the achievements on Xbox One.
Watched 1 hour of live video on Twitch channels that have less than 10 viewers.
Watched 10 hours of live video on Twitch.
Watched 1 hour of live video on Twitch.
Watched a broadcast on Twitch that has more than 100K concurrents.
Watch 100 hours of live video on Twitch.
Watch 10 hours of live video on Twitch channels that have less than 10 viewers.
Watch a single channel on Twitch for more than 8 hours consecutively.
Watch a total of 5 hours of live video on Twitch between the hours of 12am and 4am.
Watch at least 1 minute of live video on Twitch, in every hour of the day.
Watch 10 hours of live video on Twitch between the hours of 7:00pm and 11:00pm, on a weekday.