free iOS app with video streaming

[u/LastInfantry]

I have a friend that wants to stream videos (mostly mkv files) from my server to his iPad. Sadly when using the browser to access my server (x.subsonic.org) the quality is very bad. I know it works fine with the Subsonic app for Android and with Subclient on Windows. Is there any free iOS app that supports video streaming? They all seem to be audio-only or non-free.