How to Embed Video to PPTX Format File?

Win7 (x64)
LibreOffice (x64)
K-Lite Codec Pack 15.2.0 Standard (update 15.2.3)

I notice that any video & audio clips (mp4, mp3, flv, webm, mkv. etc) can’t be embeded to PPTX format file, not even be linked.
Video & audio files can only be embeded in ODP format slide.
How to fix? Your helps are much appreciated.