I made a Speed Modeling of the axe from Sion

Holy shit this is amazing. I feel bad since this is an underrated post. This must've took you a long time.

Keep on making more!

How long have you been modelling? It's pretty good but could definitely be better. If I had to guess, I'd say you've been at it for maybe a little more than a year.

A few modelling tips:

1. When you use the subdivision surface modifier, it's a good idea to tighten up your edges with proximity loops. It makes hard-surface models like much sturdier, and the angles play well with light and shadow.
2. For all the decorative bits on the axe head, I saw that you modelled the inner silhouette first, then extruded and scaled. It's much more efficient to model the outside silhouette first and then use the Inset tool (default hotkey is "i").
3. You should look to consolidate more pieces instead of adding new meshes. The grooves on the handle could have just been extrusions instead of new cylinders, and many of the decorative portions on the axe head could have been integrated into the blade's topology as well.
4. This is more of a model presentation tip, but you should really learn how to use Cycles. The Blender Internal render engine is severely outdated. Also, light your model! A gray background with barely any shadows isn't interesting to look at, and won't look good in a portfolio.
5. Speaking of gray, you should learn how to UV unwrap your models and get some sexy textures and shaders on there. Matcap only goes so far, after all.
6. As a final tip, I suggest cutting the part of the video where you sit there and wait for the render to finish. As much as we have to suffer while watching those render tiles unfold, I don't think other people are interested in that at all. Show us the actual turntable animation, not the rendering process.

Cheers from a fellow Blenderhead! If you don't believe that my suggestions are valid, I would like to put forth that I have been doing this stuff for almost 6 years.

Good job, friend. That was entertaining to watch.