1 Minute and 40 Seconds Viral Video

You're referring to a specific viral video. There are several videos that have gone viral and their exact duration is 1 minute and 40 seconds, so I'll need more context to pinpoint the exact video you're thinking of.

However, I can provide some possible options:

- A video of a cat doing a funny trick can be found easily online.
- The "David After Dentist" video, where a young boy reacts hilariously after a dentist visit, is one of the most popular viral videos and its exact duration is 1 minute and 43 seconds.
- Another video that comes to mind is the "Double Rainbow" video, where a man reacts to seeing a double rainbow in the sky. The video is around 1 minute and 42 seconds long.

If you can provide more context or information about the video you're thinking of, such as the content, the person in the video, or where you saw it, I'll do my best to help you identify the exact video.