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.
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 broadcast on Twitch that has more than 100K concurrents.
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.