The YouTube's DVR feature lets your viewers pause, rewind, and continue during the live stream. Once a viewer resumes playing, the live stream will continue from where they hit pause.
Manage DVR on live stream
- Go to YouTube Studio.
- Click Create
Go live
.
- Enter your stream details.
- On the left menu, click Stream or Manage tab.
- From the stream dashboard, click Stream settings.
- Under “Additional settings”, toggle the Enable DVR on or off.
Go live 
.Limitation on the DVR
If your live stream becomes very long, your viewers will only be able to rewind up to a limit as DVR capabilities may be limited or unavailable for streams longer than 12 hours. Viewing on Apple TV, Apple AirPlay, or older app versions is subject to lower limits.
These limits also apply when a viewer uses pause and resume. Viewers can never seek back to before you went live.
Turning DVR off
If you choose to disable DVR, viewers cannot seek back while you are streaming, but viewers can still see a recording of your entire stream once it is available. Disabling DVR is not supported for webcam and mobile streaming.
If you change your mind about DVR after going live, you can still enable or disable while live streaming. However, the changes will only apply to viewers who start playing your stream after you make the change.