Inserting the video works but after the saving the impress file, when reopening it the video is gone.
Created attachment 66504 [details]
console logs on master
On pc Debian x86-64 with master sources updated today, I reproduced the problem.
I tested from a brand new file + avi provided by reporter.
saving as ppt or pptx doesn't keep the video (link or included)
I attached stdout and stderr when saving in pptx from an odp with video linked.
Radek: one for you?
*** This bug has been marked as a duplicate of bug 34803 ***