1. Download Leawo Mac Video Converter, install and open it. You will see the main interface below.

2. Press the "Add" button to add media files, or directly drag the files in from the file browser. The imported files will be on a list according to the sequencing order. You can change the file name, preview the media file and take some screenshots.

3. Click on the "Edit" icon under the video preview window or right click on the video file and choose video edit to get into the "Edit" panel, you can get a better effect through some video editing features if you like.
a. Upon "Trim" panel, drag the triangle limiters on the player bar or enter the precise time value to split the video.

b. Go to "Crop" section and adjust the dashed frame on the player window to remove black margins.
c. Within "Rotation" panel, revolve the video to a suitable angle: horizontal flip or vertical flip, rotate 90° clockwise or rotate 90° counterclockwise.

d. Under "Effect" tab, move the handlers to modify video brightness, contrast, saturation and audio volume, etc.

e. Go to "Watermark" panel, import an image or enter a text as a watermark and put it on the video surface.

4. Leawo Mac Video Converter offers optimized profiles for video conversion along with sufficient profiles for common media formats. Click on the file format of the original video on the file list and it will switch to the following panel where you can choose a suitable for the output.

Each profile is connected with a set of parameters which are found by clicking "Add Profile" button. Then you can change the parameters, such as Video Codec, Quality, Video Size, Bit Rate, Frame Rate, Aspect Ratio and Audio Codec, Quality, Bit Rate, Sample Rate, Channels, etc.  

5. When you are ready, go back to the main interface to begin the process.