regarding dx11 with beta30 you’ll have to wait until @vux releases a suitable pack.
regarding the addonpack your screenshot of the root patch looks wrong. you don’t have to change anything there if you only want to use the addonpack or any of the other packs. you only need to add paths there if you want to use other contributions
so you just place \addonpack in your main vvvv directory. thats it.
if you’re looking for the vlc filestream missing in 64bit builds tells you that it is not available in 64bit builds (which you seem to use)