Video in Powerpoint out of sync

[Ruben]

When displaying a powerpoint presentation on a projector, the video and audio of all (mp4) videos are out of sync. How come? What can I do about it? Thank you in advance

(New laptop, Windows 10, Newest Office version, video's for example in 720p with audio, few minutes video at about 2 mbps, about 50 MB size).

[#2]

Video seems to display slower than the audio. It's completely out of sync. Mouths are moving too slow.

How come? It's an 720p mp4-video.

Thanks in advance!

[#3]

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