Yes, this was working on our local codebase.

I would recommend to deploy the ACS packages manually. If you use Cloud Manager, it will complain about security vulnerabilities.

You should be able to use EFs in static templates.https://experienceleague.adobe.com/docs/experience-manager-learn/sites/experience-fragments/experience-fragments-feature-video-use.html?lang=enhttps://medium.com/exadel-digital-marketing-technology-practice/aem-experience-fragments-templates-5047bc78...

If you're using AEM as Cloud, you can update this seamlessly via CSV. Create Meta schema and apply this at the parent folder. All child folders inherits this.Use the CSV exporter functionality to update the metadata: https://chintalapudi4.medium.com/aem-dam-bulk-metadata-update-using-curl-6049c60fe9...

Great!

You can use Dynamic Media (DM) for both AEM as Cloud and other specific AEM versions. #1. Correct. Once you purchase the DM, you can ask your Adobe rep to create multiple accounts. So you can use individual accounts on different environments (DM credentials are same for all envs). Once these account...

Are you setting the AEM as Cloud on your local? First, there is no localhost:4503/content.html. Try login here: localhost:4503/libs/granite/core/content/login.html and go to: localhost:4503/crx/de. If you're seeing this then your server is up and running fine. If you want to go to UI then try this: ...

What Java version are you using? See below similar thread:https://experienceleaguecommunities.adobe.com/t5/adobe-experience-manager/error-on-quick-start-aem-6-4/m-p/243698

Seems like a browser issues and I would recommend to raise a support ticcket.

seems like a lot of inconsistencies in your datastore. Check the below article and try:https://helpx.adobe.com/experience-manager/kb/datastore-inconsistency-record-not-found-.html Thanks.