Apple Developer - What is the 'Fonts' Capability under Register an App ID for?

Question

I need to register an App ID in my Apple Developer account and saw under the \'Capabilities\' section \'Fonts\'. Which I found on means \'Fonts: Font Installation allows you

Answer 1

Does anyone know in what circumstances do you need to tick that Fonts capabilities box and how to use it?

Yes, new in iOS 13 your app can include fonts and can make them available to all the user’s apps by calling CTFontManagerRegisterFontURLs. This is called installing fonts. You need the capability to do that. The capability is explained at 5:46 of the video you cited in your question. Watch the video, it explains all about this.

You do not need the entitlement merely to include and use fonts within your own app.