public <T> VideoModelRequest<T> using(final FileDescriptorModelLoader<T> modelLoader) {
        return new VideoModelRequest<T>(modelLoader);
    }
Returns a new request builder that uses the given {@link ModelLoader} to fetch a
{@link ParcelFileDescriptor} for loading video thumbnails.

@param modelLoader The model loader to use.
@param <T> The type of the model.
core/src/main/java/com/bumptech/glide/RequestManager.java