Status code 200 but file not found on server in xcode

Question

i am new at IOS and am working for uploading a video file on server using NSURLConnection. When i upload video on server it returns status code as 200 but the dictionary objects show as:

    Dictionary {
OK = 0;
info = "File not found.";
}

I am completely fed up with all this for not getting whether its server problem or problem at my side.my code for this is

    NSArray *file=[[appDelegate.array_Allideos objectAtIndex:buttonTag] componentsSeparatedByString:@"."];
    NSString *date=[file objectAtIndex:0];
    NSString *extension=[file objectAtIndex:1];
    NSString *video_title=[NSString stringWithFormat:@"Video%d.mov",buttonTag+1];

    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES);
    NSString *documentsDirectory = [paths objectAtIndex:0];
    NSString *filePath=[NSString stringWithFormat:@"%@/%@",documentsDirectory,[appDelegate.array_Allideos objectAtIndex:buttonTag]];

    NSData *videoData=[NSData dataWithContentsOfFile:filePath];
    NSString *encodedFile=[videoData base64Encoding];

    NSMutableDictionary *dictionary=[NSMutableDictionary new];
    [dictionary setObject:@"xyz@gmail.com" forKey:@"UserID"];
    [dictionary setObject:video_title forKey:@"video_title"];
    [dictionary setObject:encodedFile forKey:@"video_stream"];
    [dictionary setObject:date forKey:@"recorded_date"];

    NSURL *url=[NSURL URLWithString:@"my url"];

    NSError *error;
    NSDictionary *jsonDict=[NSDictionary dictionaryWithDictionary:dictionary];

    NSData *jsondata = [NSJSONSerialization dataWithJSONObject:jsonDict                                                   options:NSJSONWritingPrettyPrinted error:&error];

    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:60.0];
    NSLog(@"Length: %u",[jsondata length]);
    //[request setValue:@"text/html,application/json" forHTTPHeaderField:@"Accept"];
    [request setValue:@"multipart/form-data; boundary=AaB03x" /*@"image/png,charset=utf-8,application/x-www-form-urlencoded" */forHTTPHeaderField:@"Content-Type"];
    [request setHTTPMethod:@"POST"];
    [request setValue:[NSString stringWithFormat:@"%d", [jsondata length]] forHTTPHeaderField:@"Content-Length"];
    [request setHTTPBody:jsondata];

    NSOperationQueue *queue = [NSOperationQueue currentQueue];

    [NSURLConnection sendAsynchronousRequest:request queue:queue completionHandler:^(NSURLResponse *response, NSData *data, NSError *err)
     {
         if ([data length] > 0 && err == nil){
             NSError *parseError = nil;
             NSDictionary *dict = [NSJSONSerialization JSONObjectWithData:data options:0 error:&parseError];
             NSLog(@"Server Response (we want to see a 200 return code) %@",response);
             NSLog(@"\nDictionary %@",dict);
             //if response is generated sucessfully
         }
         else if ([data length] == 0 && err == nil){
             NSLog(@"No data returned");
             //no data, but tried
         }
         else if (err != nil)
         {
             NSLog(@"There was a error: %@",err);
             //couldn't execute request
         }
     }];

}