I know this topic, and I have been doing video editing recently. The following four steps will help you, I hope I can help you ~

Step one. Choose to start writing.

Open the clip home page and select Start Creation.

Step two. Select materials.

Select two desired materials, and then select Add.

Step three. Select the connection location.

After opening the page, select the connection position of the two materials.

Step four. Complete the addition.

Select the required transition effect, and select the lower right corner to check and confirm.