Hello,
Apologies for the delay in this answer. For some reason, you were not re-directed to the new BoldGrid Support page when you asked your question. Questions that were not supposed to go this older system are being addressed. So, again, our sincere apologies for the confusion.
There are no updates to the video issue as per my reply. Custom coding would be required for additional functionality like having a row/section with a video background. Responsive design means that the design would need to be able to handle a change in screen size and adding a video background would cause issues that could affect the responsiveness.