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 a single channel on Twitch for more than 8 hours consecutively.
Watched a broadcast on Twitch that has more than 100K concurrents.
Watched 10 hours of live video on Twitch between the hours of 7pm and 11pm on a weekday.
Watched a minute of live video on Twitch, in every hour of the day.
Watched 100 hours of live video on Twitch.
Watched 10 hours of live video on Twitch channels that have less than 10 viewers.
Watched 5 hours of live video on Twitch between the hours of 12am and 4am.
Watched 10 hours of live video on Twitch.
Watched 1 hour of live video on Twitch channels that have less than 10 viewers.
Watched 1 hour of live video on Twitch.