How are you referring the video URL in the HTML? Can you paste the HTML code?

I recommend using netcentric ac tool for the same. You will have to apply read permissions on folder level and for the children, you can give the necessary permissions needed.https://github.com/Netcentric/accesscontroltool 

Which tool or method are you using to apply permissions?

Some resources from Adobe docs are below -How components are being loaded? - https://experienceleague.adobe.com/en/docs/experience-manager-65/content/implementing/developing/components/developing-componentsHow the clientLib works? How dependecies are being loaded? - https://experienceleague.adobe.co...

The DAM Update Asset workflow which processes the image contain multiple steps like metadata extraction, dynamic media related process, ffmpeg processing for videos, and so on. The default renditions which are generated are needed to display the thumbnail images in assets console like card view, col...

 Moving a metadata field from one tab to another in metadata schema should not affect existing metadata on the assets. While moving, you need to make sure that the same property name is used so that the metadata captured on the asset is visible on the new tab.

 What type of images are being uploaded? I mean mime-typeHow is the metadata stored in the binary? Is the metadata having custom namespace? 

Hi All the repository related actions like node creation, property modification etc.. are captured in audit.log file. But I think you might have to enable debug mode.If you want events related to page, asset or replication, then you can use the following ACS Commons feature to search and get the rep...

Please try this - https://medium.com/adobetech/aem-bulk-sites-creation-live-copies-automation-using-wcmcommand-servlet-6aa738dc0a73I have not tried in AEM as a cloud service though.