Coping to HDD and burning with e.g. Nero is just as good,
If you want to use Encore:
Go to build and set Create Using to DVD volume.
Browse to DVD-rom station and select the Video TS folder.
Either way will work fine. Personally, I use John T's method, and just let ImgBurn Copy the DVD. It's a little bit more work, if you only have one DVD drive/burner, but I have several, so I just choose the Source Location as I:\ and the Destination Location as J:\, or K:\. Takes hardly any time at all.
Tips: do not burn at the fastest possible speed, and also use premium blank disc, like Verbatim, or Taiyo Yuden. Do not use Memorex, TDK*, recent Ritek*, or any "store brand."
* Both WERE respected brands at one time. Older Riteks are still relied upon. However, it appears that each might have adopted the "Memorex business model" - buy from the very cheapest mfgr. and re-brand. A spindle of 100 might have blanks from 4 different suppliers, though all will have the Memorex label on it.
Coping on the fly is not always flawless.
With recent gear, I have not had any issues - yet!
Going back to earlier generations of burners, buffer overruns were common. Back then, I always copied to the HDD, then held my breath, when I went to burn. For the most part, those days seem to be behind us. However, now I have to get a real "coaster," 'cause I do not create as many from blank CD/DVD media nearly so often.