Video Embed in Code block not filling Divs

Hi all,
Apologies if this problem has been fixed before but I haven’t found an answer to it yet. Currently I have a custom code block that is playing an mp4 from a google drive. This is set to 100% width and 100% height, so is the custom code block. This sits within a container that rounds the corners of this container
The issue is that the code block doesn’t seem to be filling the whole of the container, so the round corners is only working properly on the top corners, and only half so on the bottom two. Anyone got any bright ideas as to why this might be occurring?

Thanks in advance ! :slight_smile:

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