Librtmp

In the Kodi Wiki it says I should have the following.

Program Files (x86)/Kodi/system/players/dvdplayer/librtmp.dll

but I have

Program Files (x86)/Kodi/system/players/VideoPlayer……
then empty

Can somebody please tell me

1. Do I need librtmp.dll?

2. If so where can I get it?

3. How would the lack of it manifest itself on my system (NUC, W10 latest updates, 17.3)?

4. Why have I got VideoPlayer in place of dvdplayer?

Thank you in advance.