As of late, I'm a bit leery of offering critiques. I certainly don't want to discourage new potential artists. One of the things I always ask new artists is where are you going with your art? The best way to answer is to post examples of any artists work that you hope to emulate. The reason for this is to compare where you are today and to know how to help you to get to where you want to be.
I've been contemplating for a while now in how I would like to respond to the work you've posted in this thread and others. I can tell by your videos that your very confident in what your doing at the moment which is great. I think you will find that as your skills progress, you will understand the importance of documenting when you look back on these and realize how far you've come.
One of the things that I've noticed is that your works bear a similarity to airbrushed works where there is heavy use of hard edged masking. I can see this here in your video.
I'm not sure what tool you used, but it seems like you just made a selection and filled it with solid black.
There's no fur texture development in depth and you just went back and softened the solid black hard edges with a "fur" brush.
There's also only minor texture development in all of the fur.
In airbrushing, one of things that many new AB artists tend to do is to hide or cover difficult areas with darkness.
We see that in digital renderings as well, such as here:
And here:
As I stated in the beginning and Helios mentioned, we really don't know where your going with your work and these example may be the style you prefer, and there's nothing wrong with what your doing as long as the work your doing here meets the expectations that you've set for yourself.
In order to establish credibility with my advice, I have quickly thrown together a rendering of this same Tiger to show some of the differences between the style your doing and that of my own. I won't post it in your thread unless you give permission.