If you want to change your email address connected to your YouTube channel, you need to move the existing channel to a different account. More here: https://yt.be/help/sVnV
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
If you want to change your email address connected to your YouTube channel, you need to move the existing channel to a different account. More here: https://yt.be/help/sVnV