Embedded video not responsive

Hey all,

Not sure if anyone of you has ever dealt with this issue but I have a video that I want to embed in the module. So I add it to storyline (add video > from web > copy embed code). I fit the video in module on a slide. But when I export the video the size (dimensions) is not the same as I have it in the Storyline project. For some reason it appears smaller and even cut out - cuts away the bottom part per example. 

I tried disabling locking the aspect ratio but that doesn't work.

I added the video itself the storyline file and that works fine but I need to embed it because of company policy/saving memory as we have limited memory in our LMS system for the time being.

Is anyone even remotely familiar with this strange behaviour? So embedded videos appear to be cropped/cutout and the dimensions of the frame are different when looking at the .story file and how it looks like after export or uploading to review 360. Which I find weird.