Trim before you over-compress
If a video contains seconds or minutes you do not need, removing them reduces file size without lowering the quality of the footage you keep.
Match resolution to the target
A short clip can often stay at 1080p. A long clip forced into 10–25 MB may look better at 720p or 480p because each pixel receives a healthier share of the available bitrate.
Do not compress an already tiny file
Re-encoding a file that already fits your target can reduce quality for no practical benefit. FitMyVideo warns when the chosen target is close to or larger than the original file.
Put the idea into practice.
Choose a target size and let FitMyVideo calculate the technical settings.
Open video compressor