I just tried to embed a video in LibreOffice Impress 5.3.7 and run it in a continuous loop. This does not work. However, I have successfully tested this with the same video in LibreOffice Impress 5.3.6.1.
Why does this feature not work in LibreOffice 5.3.7 anymore?
Cross-posted to https://stackoverflow.com/questions/48383238/libreoffice-impress-video-loop-does-not-work-in-newest-version-5-3-7.
I still have the same problem with 6.0.7.3 on Win 7. Because of this bug, I stick to 5.3.6.1 on my notebook for presentations.
The question is also at Video looping in Impress not working, although still unresolved. (Note: My original comment is no longer accurate, and the link goes nowhere. If anyone else can delete the comment, I would be grateful.)