1. First create and open the PPT file, and then create a new slide. Insert video. PPT supports videos in avi, asf, wmv and other formats. The operation steps are: click the video in the file in the Insert drop-down menu, open the folder, find the corresponding video, and import it.

2. Check the video size and set the slide size. Right-click the video and select "Size and Location" from the drop-down menu. Then a dialog box for setting the video format will pop up. Look at the "original size" of the "size" item and you will see 27.09x15.24cm. Remember the data and close the dialog box.

3. Set the size of the slide. Slide size is directly proportional to the video size (resolution) to be inserted, or both are the same! Step: Click Design-Page Setup to open the page setup dialog box, fill in the width and height of the slide, and the slide direction is horizontal. Click OK to return.