They have a how to utilize this site faq? I just click on buttons to find out where it goes. I drive my DW crazy on trips because I drive the same way.
But as to your question, on this I may not be the one to ask, I have not been knitting that long. knit socks toes-up to avoid picking up stitches at the flap. But IMHO a needle is a needle, if it can be done with DP it can be done with circulars, and on the other side if it can be done with circulars it can be done with DP. A lot has to do with what you are comfortable with.
Like the video I was taught to pick up and knit straight to the circular needle. I may be easier if you use a longer circular needle than a short needle.