You can follow the numbered steps below to make use of video effects with iMovie:

1. You'll need to download iMovie to start off and then install and launch the program. Once the program is open, click on File and then Import in order to start importing the video file or files you want to work with. iMovie users can import a range of different video files like MPEG, DV, and HDV.

2. Once your videos have been imported, head to the Project Library selection and click on a clip you want to add iMovie effects too. A Gear symbol will appear, and you can use them to click on Clip Adjustments. From there, an Inspector window will appear with Video Effect: None in it.

3. Click on the Video Effect button to access the library of free iMovie effects and iMovie filter options. You can hover your mouse over the different effects to see what they do and learn more, and then click on a video effect in iMovie you'd like to use to add it to your video.

4. Once your new effect has been applied, you'll go back to the main dashboard area of iMovie, and you can preview the effect in the window in the top right. You can then add other iMovie filters to download to your file, as desired, or simply save and export your file if you're happy with the final result.

There are various different effects available for use in iMovie, including the following:

• Color adjustments. iMovie users can alter or enhance the colors in each clip they use.

• Crop. You can crop your clips to adjust their size and remove unwanted elements.

• Rotate. Clips may also be rotated at different angles.

• Stabilize. Shaky videos can be stabilized for a clearer and cleaner viewing experience.

• Transitions. iMovie has a lot of different transitions that let you move from one clip to another, like iMovie fade-in or fade-out.

• Speed. The speed of clips can also be adjusted to create a slo-mo or fast effect.

• Filters. Many different filters can be used to change the appearance of the video visuals, like a black and white or old-timey filter.

• Green screen. The green screen effect lets users cut out a subject and change the background of their files.

• Split-screen. Files can also be displayed in split-screen mode.

• Picture-in-picture. This effect allows two pictures to be displayed simultaneously.

• Audio. Various audio effects can also be used to enhance the audio or add new audio tracks.

Users who want to add effects to their videos can also make use of Movavi Video Editor to do so. Movavi Video Editor is available as a free download and works on both Mac and Windows. It features a wide range of visual effects, including filters, transitions, titles, and LUTs. Users can also recreate movie-style green screens with the Chroma Key effect. Follow these steps to learn how to add effects in iMovie alternative, Movavi Video Editor:

1. First, download, install and launch the Movavi Video Editor program. Click the Add Files button to add your first video. Your chosen video should appear in the Media Bin. Next, drag and drop your file from Media Bin to the Timeline.

2. From there, you can simply browse through the filters and visual effects menus using the buttons on the left side. The buttons will open up menus of filters, and you can click on each one for a preview of what it might look like in the preview window to the right. When you want to add a certain filter, simply drag and drop it onto the timeline.

3. If you want to make other edits to your video, like color adjustments, you'll need to select the video you want to work with and then click on the relevant buttons, like the Color Adjustments button or Manual Adjustments button, which opens up various sliders you can alter.

4. When you've finished making edits and adding effects to your videos with Movavi Video Editor, you'll need to save your new file and export it. Click on the Export button and then select a file format and save location. Click the Start button.