1. Check Video File Formats:
Make sure the video files you are inserting into the PowerPoint are in the supported format. PowerPoint video formats include .mp4, .wmv, .mov, .avi, .mpeg, and .swf.
2. Check Video Codecs:
Check and make sure the video files you are inserting into the PowerPoint have supported audio and video codecs. Microsoft recommends using video files that are encoded with the H.264 video codec and either the AAC or MP3 audio codec.
3. Check Volume Settings:
Check the Volume Setting of the video files you are inserting into the PowerPoint to make sure the volume is not turned down too low.
4. Update Media Drivers:
Update the media drivers on your PC to ensure the audio and video codecs embedded in the video files inserted into PowerPoint are running smoothly.