ALso - assume you want to pull data from MySQL. You can use a DataSourcePool to help you setup a connection. See this article for information about creating a custom AEM service that uses a DataSourcePool to set a connection to MySQL: Scott's Digital Community: Querying MySQL data using an Adobe Exp...

You need to create a custom service that uses SQL to pull data from the relational database and updates the JCR. As Gaurav suggests - the details of how you do this depend on how much data. For example - if you want to move data from a single table to the JCR, you would need to read the data from th...

Are you following the documentation exactly as is? If so - please open a support ticket as you may have encountered a software bug,

This is more of Network/Apache issue then AEM. Confirmed with customer support as well.

OOTB - this is not possible.

This is not a configurable setting. Looks like there is a software bug. I checked with customer support and they agree.  Please open a support ticket as you may need a hotfix.

Please consult with this doc - AEM Forms on OSGi Groups and PrivilegesAlso - did you login with admin credentials?

Our team asked you look here -- this might work https://adobe-consulting-services.github.io/acs-aem-commons/features/ui-widgets/show-hide-widgets/index.html

Here is 6.4 -- Scott's Digital Community: Creating an Experience Manager 6.4 YouTube Component

We have some articles that talk about custom video components.1 - See: Adobe Experience Manager Help | Creating an AEM 6.4 HTML Template Language movie component  - this plays videos located in the DAM. An author selects this using a component dialog.2 - An article that shows you how to play YouTube...