It looks like you have a better understanding of how to draw your boxes now. I can see that your sets of lines are starting to converge towards their shared vanishing points. The accuracy of your convergences will improve over time given practice.

Box 3 is a good example of what you should be aiming for. You can see with your red and green corrections that even though the sets of lines may appear perfectly parallel at first, in your corrections they still converge slightly towards their shared vanishing points. This is a good improvement.

From watching your video I noticed a couple things that you will want to consider in your future warm ups. The first being how you rotate your page as you are constructing your box. You are doing a good job of placing your points where you think your next line should go but I think you should try to spend a bit of time looking at that point you place on the page and consider how that line will affect your other sets of lines.

You can see at this stage of my construction in the video I sent, I haven't actually made any lines yet. I have instead, plotted all three sets of lines that make up the box and examined those convergences from all directions.

Then when I believe I have planned to the best of my ability I begin to execute my marks. Which leads to my second point.

When you were constructing the back corner of your box you did not appear to be abiding by the ghosting method. Remember that when you are working through this course you should employ the ghosting method for every mark you make. You can see in the video that for most of my lines (I still forget to ghost once in a while like any human) I do multiple passes using the ghosting method before putting my pen to the page. This step like every other should not be skipped.

All that being said, it appears that you have a better understanding of how to construct your boxes and you can now continue to lesson 2!

Thank you very much for taking the time to film yourself drawing for me.