when you get a piece memorized and dont need to read the sheet music, take a look down at the hair where it meets the strings. Listen to how the string responds at different locations. Picture that area between the fingerboard and bridge as a 4 lane freeway, fast lane at the bridge. 

Try to keep it in the middle of the road... LOL I've learned (from a good teacher FM) watching and listening that closer to the bridge doesn't allow the string the proper distance to vibrate and closer to the fingerboard allows too much distance and thus a muffled or softer sound. In the video, (watch it yourself again) you are in the "slow lane" with the G string and the "fast lane" with the E string. Understand?

Forget the music for a second and just play the strings, play scales or just random notes and notice the 'feel' of a properly and sufficient rosin coated bow as it glides across the strings. My violin sounds best when I'm slightly closer to the fingerboard but I try to keep all the strings playing in the 2 center lanes of that area.

I'm not trying to take FMs' place here teaching, hell, everyone knows I'm moving too fast as it is... LOL Just some observations of myself as I compare myself to you...and your playing. I also find if I'm more aggressive with my practice, and less timid at the bowing, (as if I don't care how loud the violin is) it turns out better. 

Did this help at all? coming from a fellow beginner it might make sense to you in that simple manner. It did for me when I was taught it.