Preload / cache video from network URL

Question

I am using SCPlayer (a subclass of AVPlayer) to play back videos stored on the server

SCPlayer.h https://github.com/rFlex/SCRecorder/blob/master/Library/Sources/SCPlayer.h

SCPlayer.m https://github.com/rFlex/SCRecorder/blob/master/Library/Sources/SCPlayer.m

I would like to be able to preload the video before playing SCPlayer, I tried this for storing AVURLssets:

- (AVURLAsset *)addedOrPreloadedVideoAssetWithStringURL:(NSString *)urlString {
    if (![self.preloadedVideoAssets objectForKey:urlString]) {
        [self removePreloadedVideoAssetIfNeededAndAddKey:urlString];
        [self.preloadedVideoAssets setObject:[AVURLAsset URLAssetWithURL:[NSURL URLWithString:urlString] options:nil] forKey:urlString];
    }
    return [self.preloadedVideoAssets objectForKey:urlString];
}
-(void)removePreloadedVideoAssetIfNeededAndAddKey:(NSString *)newKey {
    [self.preloadedVideoAssetsUrlKeys insertObject:newKey atIndex:0];
    if (self.preloadedVideoAssetsUrlKeys.count > PRELOAD_VIDEO_LIMIT) {
        for (int i = PRELOAD_VIDEO_LIMIT ; i < self.preloadedVideoAssetsUrlKeys.count ; i++) {
            [self.preloadedVideoAssets removeObjectForKey:[self.preloadedVideoAssetsUrlKeys objectAtIndex:i]];
            [self.preloadedVideoAssetsUrlKeys removeObjectAtIndex:i]; 
        }
    }
}

Using:

NSString *sampleUrlString = @"http://download.wavetlan.com/SVV/Media/HTTP/H264/Other_Media/H264_test8_voiceclip_mp4_480x320.mp4";
AVURLAsset *asset = [self addedOrPreloadedVideoAssetWithStringURL:sampleUrlString];
[player setItemByAsset:asset];

This allows me to play videos that I have already played using [self addedOrPreloadedVideoAssetWithStringURL: sampleUrlString] , but calling it in advance will not preload the video (Reference App: Vine).

? ( AFNetworking, )