To use CapCut templates for transitions, follow these steps:

Open the https://captemp.pro/ and create a new project.
Import your video clips into the timeline.
Tap on the clip where you want to apply a transition.
At the bottom of the screen, tap on the "Effects" icon (represented by a magic wand).
Browse through the available templates by swiping left or right.
Select a transition template that you like by tapping on it.
Adjust the duration of the transition by dragging the handles at the edges of the template in the timeline.
Preview the transition by playing the video in the preview window.
Once you are satisfied with the transition, tap on the checkmark or "Apply" button to apply it to your clip.
CapCut provides a wide range of transition templates, including fades, slides, zooms, and more. These templates can help you achieve smooth and visually appealing transitions between your video clips without the need for manual keyframe adjustments.