Objective-C: How to add thumbanils to a TableView From Videos?

Objective-C: How to add thumbanils to a TableView From Videos?

Bellow i have some code that reads and lists the names of files in the
documents directory of my application. This works fine and i know want to
add thumnails from each of the videos i get so i found this code:
NSURL *videoURL = [NSURL fileURLWithPath:@""];
MPMoviePlayerController *player = [[MPMoviePlayerController alloc]
initWithContentURL:videoURL];
UIImage *thumbnail = [player thumbnailImageAtTime:1.0
timeOption:MPMovieTimeOptionNearestKeyFrame];
cell.imageView.image = thumbnail;
[player stop];
However I'm not sure where to point the path to my files so that it adds a
different thumbnail for every separate video my tableview is displaying.
Here is my full code where I'm getting the video files and displaying in
table:
-(UITableViewCell *)tableView:(UITableView *)tableView
cellForRowAtIndexPath:(NSIndexPath *)indexPath{
UITableViewCell *cell = [tableView
dequeueReusableCellWithIdentifier:@"MainCell"];
if (cell == nil) {
cell = [[UITableViewCell
alloc]initWithStyle:UITableViewCellStyleDefault
reuseIdentifier:@"MainCell"];
}
NSLog(@"urlstring %@",[filePathsArray objectAtIndex:indexPath.row]);
NSArray *paths =
NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,
NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
filePathsArray = [[NSFileManager defaultManager]
subpathsOfDirectoryAtPath:documentsDirectory error:nil];
cell.textLabel.text = [filePathsArray[indexPath.row] lastPathComponent];
filePathsArray = [[NSArray alloc] initWithArray: [[[NSFileManager
defaultManager] subpathsOfDirectoryAtPath:documentsDirectory
error:nil]mutableCopy]];
NSURL *videoURL = [NSURL fileURLWithPath:@""];
MPMoviePlayerController *player = [[MPMoviePlayerController alloc]
initWithContentURL:videoURL];
UIImage *thumbnail = [player thumbnailImageAtTime:1.0
timeOption:MPMovieTimeOptionNearestKeyFrame];
cell.imageView.image = thumbnail;
[player stop];
return cell;
}
Thanks in advance.