Mail Video Compressor helps you make phone videos small enough to send as email attachments. Choose a video with Android Photo Picker, select a common target size such as Gmail 25 MB or Outlook 20 MB, preview the expected output, and compress locally to MP4.
The app does not upload your video. Compression happens on your device, and the compressed result stays in app cache until you save, share, preview, delete it, or Android clears cached data.