Short answer: find the largest videos on iPhone before deleting anything else. A few heavy clips can free more space than hundreds of normal photos, which is why the smartest video cleanup starts with identifying the biggest files first.
This matters because urgent storage cleanup goes wrong when people delete dozens of small items while the real storage pressure is still sitting inside a handful of heavy videos. Finding the biggest clips first gives you the fastest possible storage win with the fewest decisions.
What to look for first
Old screen recordings and exported edits that were only needed once.
Saved chat videos and forwarded clips that got stored locally.
Vacation, concert, or event videos that are long enough to be worth reviewing separately.
Duplicate or near-duplicate clips that are still taking space in the library.
Why this works better than random deletion
One heavy clip can outweigh dozens of ordinary images.
The biggest storage blocks are easier to notice once they are isolated.
You reduce storage pressure quickly without touching the whole library.
It becomes clearer whether video cleanup alone is enough or whether the phone needs a broader pass.
What to do after you find them
Once the largest videos are visible, review them in order of weight and value. Keep the clips that still matter, remove the obvious low-value files first, and leave uncertain recordings for a second pass instead of deleting under pressure.
If you want the action version next, continue to How to Delete Large Videos on iPhone. If video cleanup is only one part of the problem, move into free up iPhone space.
The fastest storage win on iPhone often starts by finding the biggest videos, not by deleting the most files.