1 Second Everyday: Video Diary (macOS)

Last Updated: Jul 25, 2026 Developer：1SE

Play 1 Second Everyday: Video Diary on PC and Mac

1 Second Everyday: Video Diary, developed by 1SE, is a lifestyle and video editing app that transforms your daily moments into a personal movie of your life. Rooted in the simple idea of recording just one second each day, the app helps you build a living archive of memories that grows more meaningful over time. With MuMuPlayer, you can enjoy this creative experience on PC, giving you a larger screen to review, select, and compile your daily clips with greater ease and comfort.

1 Second Everyday offers two distinct project styles: Timeline for a classic day-by-day video diary, and Freestyle for capturing trips or special events. The app is completely ad-free and lets you rotate and fill the frame on any clip, so vertical or crooked footage is never a problem. You can mash together videos of any custom length, whether a single month or several years, and write private notes to accompany each day. Reminder notifications keep you consistent, and your footage stays fully private unless you choose to share it. For those who want expanded functionality, the 1SE Pro subscription unlocks collaboration with friends, unlimited cloud backup, multiple snippets per day, clips up to 10 seconds long, royalty-free music for your mashes, brightness and exposure editing, and the ability to remove the 1SE branding from exported videos.

Using MuMuPlayer to run 1 Second Everyday on PC brings real practical advantages to this kind of creative project. Reviewing dozens of short daily clips on a full desktop monitor makes it far easier to choose the best moment from each day, and typing personal notes using a physical keyboard is quicker and more comfortable than tapping on a phone screen. MuMuPlayer also keeps the app running in the background so your reminders and workflow stay uninterrupted, making your daily video diary habit easier to maintain over the long term.

About the Game

There is something quietly powerful about watching a single second from every day of your life play out in sequence. 1 Second Everyday: Video Diary is built around this idea, giving you a structured and personal way to document your life one tiny clip at a time. Created by 1SE founder Cesar Kuriyama, who has practiced this habit for over a decade, the app was born from a genuine belief that no day should be forgotten. The result is a tool that turns ordinary afternoons, quiet mornings, and unexpected adventures into a continuous, growing film of who you are.

The app supports two core project formats to suit different documentation styles. The Timeline project is the classic mode, designed for recording one clip per day and building a chronological diary of your life. The Freestyle project works differently, giving you the flexibility to capture moments from a trip, an event, or any defined period without the day-by-day structure. Both project types can be used freely, and 1SE Pro subscribers can create unlimited projects of either kind.

Here is what makes 1 Second Everyday stand out as a free experience:

Completely ad-free usage with no interruptions
Frame rotation and fill tools to fix vertical or crooked footage
Unlimited mashing for custom video lengths, from a single week to multiple years
Private daily notes you can write alongside each clip
Customizable reminders to keep your recording habit consistent
Full privacy control, your clips are never shared without your permission

1SE Pro takes the experience further with a focused set of premium features. Collaboration lets you invite others to contribute clips to shared projects, making it possible to remember life together with friends or family. Unlimited backup ensures that your archive of memories is protected and never at risk of being lost. Pro users can also record up to two separate snippets per day and extend each snippet to a maximum of ten seconds, which adds more flexibility when a single second is not enough. A library of royalty-free music lets you score your mashes with the right atmosphere, and brightness and exposure controls give you basic but useful editing power directly within the snippet selector. Removing the 1SE branding from the end of exported videos is also a Pro-only option.

The philosophy behind the app is worth noting. Kuriyama describes the project as something that holds him accountable for making each day meaningful. After a decade of recording, he had a full hour of footage covering his thirties. The app is designed to give anyone access to that same long-term perspective, regardless of how much time they have to spend on it each day.

Playing 1 Second Everyday on PC through MuMuPlayer makes the whole process more comfortable and efficient. Browsing through daily clips on a large monitor helps you spot the best moment with much less effort, and composing notes with a keyboard is naturally faster than typing on a phone. The experience of watching your completed mashes on a bigger screen also adds real emotional weight to the project, letting you absorb years of memories in a single sitting.