We've recently introduced a space optimization and archiving feature on iOS. We recommend that you to try this out if you're running out of storage space.
Working with HD video, even with just HD seconds, adds up. We understand not everyone has the largest iPhone out there and are constantly working on reducing the space 1SE takes up. Here is a handful of tips from the 1SE community.
Within the 1SE app
Turn on space optimization for your active projects to save up to 80% of storage space. You can also archive finished projects and offload them to 1SE Cloud. Check out optimizing and archiving your projects for more info.
Delete the original videos you grabbed a second from. Your seconds in 1SE aren't connected to these source videos.
Be mindful of keeping a bunch of projects. Like Freestyles of trips or weddings. Mash those projects to have the video to share and remember, then delete the projects to save space.
Within your iPhone's settings
There are some camera settings that can increase the size of your recorded videos. Using 120 fps on slo-mo videos, 4k at 30fps, or 1080p HD at 60ps, with your phone's camera will take up more space.
Turn on Optimize iPhone Storage in the Photos & Camera settings to replace full-resolution photos and videos with optimized versions.