Over a week ago, Google enabled the ability to upload videos to local listings within Google My Business or the local listings photos section. We tested it but the videos didn't upload, Google fixed it late last week and now it seems that when you upload a video, the videos are now live within minutes of the upload.
Google's documentation says the videos are live within 24 hours but many are now reporting the videos are live seconds, if not minutes, after they are uploaded and processed via the Google My Business photos section.
Brodie Clark confirmed it on his end as well:
Time to start taking more videos of your local business!@rustybrick have tested with other videos, and it's basically instantaneous to upload a video now— Brodie Clark (@Brodieseo) January 22, 2018
Forum discussion at Twitter.