There's a Google chrome extension for this, BUT THIS SHIT SHOULD BE AN ACTUAL FEATURE ON THE SITE
If your on mobile, just block the thumbnails by opening up a videos description as fast as you can.
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 your on mobile, just block the thumbnails by opening up a videos description as fast as you can.