It seems like Google already has taken charge in changing From now on Twitch will be using Audible Magic to scan past and future video on demand footage. Any in-game music, or music that can be picked up in the background will fall victim to Audible Magic. Videos using any copyrighted music with have that portion muted, and the progress bar will change to the color red. However, live streams will not be scanned or taken down.
“The Audible Magic technology will scan for third party music in 30 minute blocks — if Audible Magic does not detect it's clients’ music, that portion of the VOD will not be muted,” the post reads. “If third party audio is detected anywhere in the 30-minute scanned block, the entire 30 minutes will be muted.”
Twitch has also stated that some user's VODs may be considered a false positive, and that users are to submit counter-notifications.

VODs will no longer be saved into Archived Broadcasts either. Users will have to manually set that in their settings, and storage for past broadcasts are being saved for fourteen days, rather than three. On the other hand members of the Twitch Partner Program and Turbo members will have sixty days.

The "save forever" feature is now being scrapped as well, to "save space" on the servers. Highlights up to two hours will be saved indefinitely, as well as any highlights in the past "regardless of length." Twitch users are urged to save or highlight VODs, past broadcasts are being removed from the servers in about three weeks.

New updates are going to be rolling out as well. Making VOD quality of service for international viewers, watch VODs on mobile and other devices, past broadcasts will be more secure with triple redundancy, and uploading your highlights to Youtube will be made easier. Improved VOD discovery, matching options from live to VOD and DVR are some of the other features Twitch have in store for us.

A new Video Manager is another new addition; allowing users to highlight, export old broadcasts, and manage expiration countdowns. Here is a tour of the new Video Manager.

Looks like Twitch has quite a bit in store for us as it expands. The termination of copyrighted music from past broadcasts shouldn't raise too much of a fuss since they won't be targeting live streams. With all these new updates coming out, it just looks like Twitch is just going to keep getting bigger.