Hi,
The tutorial will help you to set an image on collectionView Cell and when you click on any image play the video.

//
//  ViewController.m
//  YouTubeVideo
//
//  Created by lalit on 4/7/15.
//  Copyright (c) 2015 lalit. All rights reserved.
//

#import "ViewController.h"
#import <XCDYouTubeKit/XCDYouTubeKit.h>

static int count;

@interface ViewController ()<UICollectionViewDataSource,UICollectionViewDelegate>

{


    NSArray *urlArray;
     NSMutableArray *photoArray;
    NSURL *videoURL;

}



@property (strong, nonatomic) MPMoviePlayerController *videoController;
@property (weak, nonatomic) IBOutlet UICollectionView *colView;
-(void)playVideo:(int)index;

@end

@implementation ViewController

- (void)viewDidLoad {

    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.

  photoArray = [NSMutableArray arrayWithObjects:@"like.png",@"like.png",@"like.png",@"like.png",@"like.png",@"like.png",@"like.png",@"like.png",@"like.png",@"like.png", nil];

    urlArray = [NSArray arrayWithObjects:@"https://www.youtube.com/watch?v=Ji4h77ZrMc8",@"https://www.youtube.com/watch?v=Ji4h77ZrMc8",@"https://www.youtube.com/watch?v=Ji4h77ZrMc8",@"https://www.youtube.com/watch?v=Ji4h77ZrMc8",@"https://www.youtube.com/watch?v=Ji4h77ZrMc8",@"https://www.youtube.com/watch?v=Ji4h77ZrMc8",@"https://www.youtube.com/watch?v=Ji4h77ZrMc8",@"https://www.youtube.com/watch?v=Ji4h77ZrMc8",@"https://www.youtube.com/watch?v=Ji4h77ZrMc8",@"https://www.youtube.com/watch?v=Ji4h77ZrMc8", nil];


    count = 10;








    UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    [button addTarget:self
               action:@selector(aMethod:)
     forControlEvents:UIControlEventTouchUpInside];
    [button setTitle:@"Refresh" forState:UIControlStateNormal];
    button.frame = CGRectMake(80.0, 210.0, 160.0, 40.0);
    [self.colView addSubview:button];

}

- (void)aMethod:(UIButton*)button
{

    count = count + 10;

    if(count >[photoArray count])
    {
        count =[photoArray count];

    }
    [self.colView reloadData];





}


    - (void)didReceiveMemoryWarning {
        [super didReceiveMemoryWarning];
        // Dispose of any resources that can be recreated.
    }

    - (NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView {
        return 1;
    }


    - (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section {
        return photoArray.count;
    }


    - (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath{
        static NSString *identifier = @"Cell";

        UICollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:identifier forIndexPath:indexPath];

        UIImageView *recipeImageView = (UIImageView *)[cell viewWithTag:100];


        recipeImageView.image = [UIImage imageNamed:[photoArray objectAtIndex:indexPath.row]];


        return cell;
    }


    -(void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath

    {
        [self playVideo : (indexPath.row)];

    }

    -(void)playVideo:(int)index
    {
        NSString *videoString = urlArray[index];

        NSLog(@"data%@",videoString);

        XCDYouTubeVideoPlayerViewController *videoPlayerViewController = [[XCDYouTubeVideoPlayerViewController alloc] initWithVideoIdentifier:videoString];
        [self presentMoviePlayerViewControllerAnimated:videoPlayerViewController];


    }


    - (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath{

        return CGSizeMake(130.f, 95.f);
    }

    @end

In this program I have use a singleUrl for all video but you can use different Url for different image.

Add the below mention pods

<XCDYouTubeKit/XCDYouTubeKit.h>

and import the framework 
<MediaPlayer/MediaPlayer.h>