There is no problem on our side about the slider video. You could review again our demo as reference. Please follow the documentation’s FAQ (that we have provided with the main_files) to get work the slider video.
Thank you. Got the map working after adding the API key.
The video issue, can you try with the template that has no demo content. Chrome dev tools shows me it as a “Failed to load resource: net::ERR_FILE_NOT_FOUND” iframe_api