If there is no snail mark in the materials you import in the clip-and-paste, it may be because these materials have been pretreated, that is, the clip-and-paste has completed the optimization and acceleration of them, so snail marks are no longer needed.

Snail signs usually appear on imported high-resolution videos or large video files, which may take longer to process and import. When the snail logo appears, it means that the clip is being preprocessed to speed up the video playback and editing process. After preprocessing, the snail logo will disappear, and you can edit it as easily as other materials.

If there is no snail logo in the imported material, but you still encounter performance problems or video playback is not smooth, please check whether your computer meets the system requirements of editing, or try to optimize your video file to ensure that it is suitable for editing in editing.