Cannot start a video in powerpoint in S4B meeting

[Lloyd Adams]

I'm trying to play a video as part of a S4B meeting, and following guidance found here, have embedded it in a Powerpoint and uploaded to the meeting.  However, this technique has only worked for a very small video - anything of any useful size (and the real video is over 200MB) the video controls never appear (and I've tried setting the PP slide to autostart).  Is this the best approach, and are there known documented limitations?

[#2]

does the video work when presenting in powerpoint without Skype for Business? What file format is the file?

[#3]

@AlexanderHolmeset.  Yes, works in powerpoint, but when uploaded to S4B, the play commands never appear.  Appears to be related to file size.  Small video from same source, in same format (mp4) works fine.

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[#4]

I see the same behaviour. Upload a ppt from around 100mb it works fine, around 200mb no play button. And on a Mac I cannot play a single file, no matter what size.