iOS 5 - AFNetworking - Uploading Video
NSString *vidURL = [[NSBundle mainBundle] pathForResource:@"test" ofType:@"mov"];
    NSData *videoData = [NSData dataWithContentsOfURL:[NSURL fileURLWithPath:vidURL]];

    NSLog(@"The test vid's url is %@.",vidURL);

    AFHTTPClient *httpClient = [[AFHTTPClient alloc] initWithBaseURL:[NSURL fileURLWithPath: @"http://www.mywebsite.com"]];

    NSMutableURLRequest *afRequest = [httpClient multipartFormRequestWithMethod:@"POST" path:@"/upload.php" parameters:nil constructingBodyWithBlock:^(id <AFMultipartFormData>formData)
    {
        [formData appendPartWithFileData:videoData name:@"file" fileName:@"test.mov" mimeType:@"video/quicktime"];
    }];

    AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc] initWithRequest:afRequest];

    [operation setUploadProgressBlock:^(NSInteger bytesWritten,long long totalBytesWritten,long long totalBytesExpectedToWrite)
    {

        NSLog(@"Sent %lld of %lld bytes", totalBytesWritten, totalBytesExpectedToWrite);

    }];

    [operation start];

[operation start];

[httpClient enqueueHTTPRequestOperation:operation];

httpClient = [AFHTTPClient clientWithBaseURL:[NSURL URLWithString:@"http://www.mysite.com"]];

    NSMutableURLRequest *afRequest = [httpClient multipartFormRequestWithMethod:@"POST" path:@"/upload.php" parameters:nil constructingBodyWithBlock:^(id <AFMultipartFormData>formData)
    {
        [formData appendPartWithFileData:videoData name:@"file" fileName:@"filename.mov" mimeType:@"video/quicktime"];
    }];


    AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc] initWithRequest:afRequest];

    [operation setUploadProgressBlock:^(NSInteger bytesWritten,long long totalBytesWritten,long long totalBytesExpectedToWrite)
    {

        NSLog(@"Sent %lld of %lld bytes", totalBytesWritten, totalBytesExpectedToWrite);

    }];

    [operation  setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {NSLog(@"Success");}
                                      failure:^(AFHTTPRequestOperation *operation, NSError *error) {NSLog(@"error: %@",  operation.responseString);}];
    [operation start];