Our deepest condolences, we are sorry to hear the passing of your loved one. In the event of the death of a Twitch user, Twitch can work with a person authorized to act on behalf of their estate or with a verified immediate family member of the deceased to help provide data such as downloading the existing videos on a user's page or closing out an account/terminating any active subscriptions. In situations where more than a week has passed since the stream date, the VOD may expire and cannot be downloaded. We wish we could retrieve these precious memories, but our databases do not maintain the videos for very long -- we sincerely apologize. If you would like to action on the account in any way and/or obtain a copy of the highlights your brother has on his channel to keep for yourself off-Twitch, please do not hesitate to reach out via https://link.twitch.tv/PrivacyOther. We'll do our best to help.