Controlling size and position of videos

Does anyone have a suggestion for controlling the size and position of embedded video in Storyline?

I have tried (along with several others) to embed video (hosted on Wistia, in case that helps) but can't seem to get the video to land where I want on the page and the size of the video doesn't match the embed code dimensions.

I have attached here images of both the Storyline edit mode and then the resulting video display once published to web. You will see that in the published view, the video is larger both horizontally and vertically - and the x,y coordinates are wrong too.

Any suggestions?

Thanks!

Paul