If you want to unlock all the rewards including Winston skin that are available in the Twitch Drops from Tuesday, October 25 to Sunday, November 6, you will have to follow the instructions below.
Log in to your Twitch account
Link your Twitch and Blizzard account
Your game account for Overwatch 2 and your Twitch account are now linked. You just have to look at the steamers that have the mention “Drops activated” in order to obtain:
A Winston Halloween spray and the Souvenir Mug emote for Reinhardt while watching a live stream for 2 hours
A charm for Brigitte by watching a live stream for 5 hours