To remove the "grimace shake" effect in CapCut, which is a jittery, shaky motion often caused by a specific template or filter, here are the key points and steps:

• The grimace shake effect is typically applied via a CapCut template or filter that overlays a shaking animation on your video. This effect is usually embedded and cannot be simply "removed" once applied to a video

• If you have shaky footage (not from a template), CapCut offers a built-in Stabilization feature that can reduce or eliminate unwanted shakes:
  1. Import your shaky video clip into CapCut.
  2. Select the clip on the timeline.
  3. Find and apply the Stabilization tool from the editing menu.
  4. Choose the stabilization level (recommended, minimum cropping, or most stable).
  5. Preview the video to ensure shake reduction.
  6. Export the stabilized video

• For more precise control, you can manually add keyframes in CapCut to adjust the position frame-by-frame and smooth out shaky movements

• If the grimace shake is part of a template overlay (such as the popular "Grimace Shake" meme effect), it is generally not possible to remove that effect from the video because it is embedded as part of the template or PNG overlay. Attempts to remove such embedded effects are ineffective and may violate terms of service if AI tools are used

• To avoid grimace shake or similar unwanted shakes in future videos, use a tripod or stabilize your camera during filming, and use CapCut's stabilization features during editing

In summary, if the grimace shake is due to shaky footage, use CapCut's stabilization tool and keyframe adjustments to remove it. However, if it is a template effect embedded in the video, it cannot be removed once applied