Take advantage of Twitch’s Videos On Demand (VOD) system and automatically archive broadcasts
By default, Twitch doesn’t save your previous broadcasts. To enable automatic archiving of broadcasts:
- Visit your “Channel & Videos” tab
- Tick the checkbox next to Archive Broadcasts
Twitch will retain your past broadcasts at https://www.twitch.tv/USERNAME/videos/past-broadcasts
Regular broadcasters will have their broadcasts saved for two weeks, while Turbo subscribers (Twitch Prime included!) and Partners enjoy 60-day storage. During this time you can create highlights from your broadcasts and export your VODs directly to YouTube by visiting the Video Manager at https://www.twitch.tv/USERNAME/manager/
and/or record locally
Beware that working with video is resource-intensive.
Sources
https://help.twitch.tv/customer/portal/articles/1575302-videos-on-demand