How to upload video to facebook

Question

When I upload a video (format mp4, avi, mov etc...), I get a

352 error : video file format not supported.

Here is my function:

- (IBAction)uploadVideo:(id)target {
    NSString *path = @"http://********************/MyVideo.mp4";
    NSURL    *url  = [NSURL URLWithString:path];
    NSData   *data = [NSData dataWithContentsOfURL:url];

    NSDictionary *params = nil;
    [[FBRequest requestWithDelegate:self] call:@"facebook.video.upload" params:params dataParam:data];
}