<aura:application  extends="force:slds">
    <c:MyCaroussel />
</aura:application>

<aura:component controller="MyCarousselServer" implements="flexipage:availableForAllPageTypes,force:hasRecordId" access="global" >
    <aura:handler name="init" value="{!this}" action="{!c.getVideoObject}"/>
    <aura:attribute  name="Video" type="List" />   
    <lightning:layout horizontalAlign="center">
        <div style="width:25%;">
            <lightning:carousel title="My Carousel" scrollDuration="2">         
                <aura:iteration items="{!v.Video}" var="item"  >            
                    <lightning:carouselImage  
                                             src = "{!$Resource.Sailboats +'/' + item.Thumbnail_URL}"
                                             header = "{!item.Description}" 
                                             description = "{!item.Thumbnail_URL}"
                                             alternativeText = "This is a card">
                    </lightning:carouselImage>                
                </aura:iteration>
            </lightning:carousel>
        </div>  
    </lightning:layout>
</aura:component>

({
    getVideoObject: function(component,event,helper){       
        var action = component.get("c.getCurrVideo");
        action.setParams({
            recId : component.get("v.recordId")
        });       
        action.setCallback(this, function(response){
            var state = response.getState();
            if (state === "SUCCESS") {
                component.set('v.Video', response.getReturnValue());                
            }
        });
        $A.enqueueAction(action);        
    }
})

public class MyCarousselServer { 
    @AuraEnabled
    public static List <Video> getCurrVideo(String recId){  
        String[] boats = new String[] {'sailboat1.png',  'Beau sailbeat1',
            'sailboat2.png', 'Beau sailbeat2',
            'skiboat1.png','Super skiboat1',
            'skiboat2.png', 'Super skiboat2',
            'yacht1.png','Super yacht1',
            'yacht2.png','Super yacht2'};                 
                
             // not used here
            system.debug('rec Id:' + recId);
        
        List <Video> th = new  List <Video>();
        for(integer i=0;i< boats.size()/2;i++) {
            Video v = new Video();
            v.Thumbnail_URL = boats[i*2]; 
            v.Description = boats[i*2+1]; 
            th.add(v);
        }     
        return th;
    }
    public class Video {
        @AuraEnabled
        public String Thumbnail_URL {get;set;}
        @AuraEnabled
        public String Description {get;set;}
    }
}