The upload is usually the bottleneck
Home and mobile upload speeds are typically far slower than download speeds, so a 2 GB video can take much longer to upload to Drive, Dropbox, or a Slack/Teams file share than it would to download afterward. Compressing first often saves more time than it costs, especially on a slower connection.
Storage quota adds up
Free accounts on most cloud storage services come with a limited amount of shared storage across email, photos, and files. A folder of uncompressed screen recordings or phone videos can fill that quota surprisingly fast. Reducing file size before uploading is the simplest way to keep more videos within a free plan.
Keep the quality that matters
QuickCompress's intent-based presets let you choose "smaller" when quality matters most, or an exact target size when the recipient just needs to see the content. Everything is encoded locally on your Mac with Apple Silicon hardware acceleration, so a large video compresses in seconds rather than minutes.
Related
Sending directly instead of via a link? See compress video for email. Working with large 4K source files specifically? See reduce 4K video size on Mac.