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From the video, it looks like you're loading those from an Explorer window (I can tell by the rekordbox icon). Please try using the COLLECTION window instead.
I cant Drag a song from "eks" play list, into a deck, in Link... i could do it before, but now its not poseble, after recordbox 5.. the link Works, and i can serch the song trou xdj-rx, but i cant drag and drop a song on the "link" playesrs on the pc, the xdj-rx dont resond...
From the video, it looks like you're loading those from an Explorer window (I can tell by the rekordbox icon). Please try using the COLLECTION window instead.
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@Tommy > You need to allow rekordbox 5 through the firewall; please configure it per the instructions here, or disable it to verify if that's what was causing the link to not connect.
no, dont help,, all fierwals ar off... i made a video, to exsplane! https://www.youtube.com/watch?v=AeSAF1j70Lk
No, you can clearly see that I work internally in recorbox5, i do not drag and drop mp3 files from another windows window ...
dosent matter,, orginal, playlist, collection. it will not load onto the xdj-rx...
the xdj works normal, recordbox works normal, cable and modem works fin. i can load songs FROM the XDJ, but i can not drop song on the LINK player... it worked like a charm in RB4 and win7... but now totaly imposeble whit RB 5 and win10.....This do seriously not make my day....
@Tommy > No, I mean you're loading from below the EXPLORER section of rekordbox where it shows the rekordbox icon on the left:

...as opposed to the COLLECTION section:

new&better vid... same problem... https://www.youtube.com/watch?v=zQaJ4ZriZ20&feature=youtu.be
@Tommy > I'm certain that the problem exists because of a firewall, security software, networking configuration, or possibly even a malware or virus.
I tested this very setup in both Mac and PC and it works for both, so the problem is with your system.
Check that your network isn't set to Public; sometimes that can happen and then Windows blocks the traffic going to/from applications using that port.
To switch the network type, follow the instructions here.
No fierwall and open privat network, i use Proffesjonal "Paid" antivirus, but i turn OFF the securituy software for use whit Recordbox, and my Windows 10 is fully optimmalized... It worked fine whit RB 4, is it poseble to download RB 4.3. i did not save the install file off RB 4... (facepalm) :)
New video... no fierwall and a open privat network... https://www.youtube.com/watch?v=Sm5qgtUA1z4