I've scoured the whole YouTube and websites that could explain to me how to hold the violin properly, comfortably and not hinder the movement for proper and optimal playing. Almost none could help me understand and clink my logic until I found these 2 videos. The explanation is with good reasoning and with great clarity. It helps me to fully utilize my shoulder rest, maintain good posture and Thank God, I finally got rid of suffering the pain at my jaw bones and stop doubting the compatibility of my chin rest with my....chin. If that makes sense. Here's one by Yehudi Menuhin, a great violinist who's very immaculate in teaching violin techniques:
And also this lady,
The science behind it, is that, you don't actually hold the violin by the neck or rest the violin on the loop between your thumb and fore-finger. The violin could be held solely by the relaxed hold made by your shoulder and chin. This is where you should start finding the comfortable and compatible height of your shoulder rest, if you're using one. I'm using the shoulder rest and due to the distance between my shoulder and chin, I had to readjust the height of the shoulder rest. Now...I understand the logic.
Resting the violin onto your hand will hinder alot of movements since you'll be using it to not only play the notes, but to also control it from falling off your shoulders. So, let your shoulder do the work, which makes investment in shoulder rests even more logical.
Have a try and tell me how you're doing. Questions are welcome if you don't mind a good discussion.