This script will query Twitter and save the tweets it finds to a time-stamped Excel file on your computer. It also can repeat the search-and-save cycle automatically as many times as you tell it to, and wait for however much time you tell it to wait between each cycle.
If you like, you may download a .zip file containing this script in Jupyter Notebook format. For help setting up the Jupyter Notebook coding environment on your computer, see this page. Also, see these two videos for a demonstration of how to run the script and do some interesting things with the captured content.
Collecting tweets with a Tweepy Twitter scraper, Part 1 (Downloading, configuring and running the script)
Collecting tweets with a Tweepy Twitter scraper, Part 2 (Some things you can do with the results)