Galaxy S7 performance issue

Im getting very bad buffering when trying to play movies stored on my local network.

I have installed Kodi 17.3 on my GS7 via the Google Play Store.

I configured a couple of video sources using SMB. 1080p movies stored on a Windows PC.

The PC is connected to the router (Virgin Media Hub 3) via gigabit Ethernet.

The phone is connected via 5 GHz wifi. Network Speed says very strong 400Mbs

Should I expect smooth playback in this situation?

Thanks.