If you come across private Twitter videos that you want to download directly, then you’ll need to use a Chrome or Firefox extension in your browser to download the video. One option is the Twitter Downloader that you can add as a Chrome or Firefox extension. You’ll just need to install the extension and then go to the tweet in your browser that you want to download. Click the extension and have it download the private Twitter video directly to your PC. This can also be a good option for public videos rather than using a website, but it depends on whether you want to leave the app installed or not.