Hi. I've recorded my screen to show what is up with my DBO. I have no idea what's up with it so I figured a screencap of what's wrong would help a lot.
Your launcher isn't downloading all the client updates. Try uninstalling it, delete folder, disable antivirus, run setup.exe as admin, then run launcher as admin. Is should do what your video showed several times before you can press the start button. The current version is 1.57.33, when you see that number at the top of the launcher, you have the current version and it should work.
You need to go to your windows control panel and go to uninstall programs and uninstall the game. Then go to your program folder and delete the DBO folder. When open your antivirus and click disable or whatever it says for your program. Then go to your download folder and run the setup.exe as admin. Keep the anitvirus disabled and run the launcher as admin. After everything goes through and you can press start, see if you can log in. If you can, exit the program, run the english patch, turn your antivirus back on, and you should be good to go.