There are a few different ways, check out the "How to resolve a copyright strike" section of our Help Center for the details: https://goo.gl/YkBvnN
Yes, you can re-upload the video without music in it. Let us know if you have any further questions.
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
Yes, you can re-upload the video without music in it. Let us know if you have any further questions.