Well,  yep intonation is really the most difficult part  honestly . And that is what I want to achieve . While trying hard not to stop the bow while shifting  ( cause I did try that , nothing wrong with your first videos believe me ) ,  I got so confused  hearing both notes shifting,  that I did not know where to concentrate first : 

Was I  supposed to hear both notes at the same time ? 

Does it matter which shifting finger you seek to hear first . ( is it always important to focus on the first note and then search for the second one and try to blend together ? ) 

Plus had to keep in mind lots of other things as you can tell , finger pressure, finger pattern, stretching , bow speed etc. So at some point in my practice I decided to take one step at a time and send you a video of what I felt comfortable with at the moment ...so I could get the most appropriate feedback from you .

Thank you so so much .  

Rustam , thank for your comment . Well a more trained ear like Beth says that intonation is not good ...so we both have to work on that .Is hard job .

Well it is only a couple of days I just started to practise G major scale in thirds so I have not really been playing anything else to give you a more detailed reply in relation to your question . 
I am sure it will definitely help me improve intonation in other pieces and exercises . 

Barb, thanks for your comment . You are right , I too like Beth ...it is just not that easy .