This article provides a detailed guide on how to seamlessly insert video files into PowerPoint slides.
1. Inserting a video from your computer:
Step 1: Navigate to the Insert -> Media -> Video -> Video on My PC:

Step 2: A dialog box will appear; locate the path to the file you want to insert -> click

- The video result has been successfully inserted into the Slide:

2. Inserting a video file found online.
Step 1: Navigate to the Insert -> Media -> Video -> Online Video:

Step 2: A dialog box will appear; enter the search terms for the video content -> press Enter -> search results appear -> choose the desired video -> click Insert:

- The video result has been successfully inserted into the Slide:

Additionally, you can customize various effects and styles for the inserted video.
Above is a detailed guide on how to insert a video file into a PowerPoint slide.
Wishing you all success!