In bed, too early to sleep so decide to watch a film. Too lazy to go fetch my laptop.
And watch the film on #VLC on me phone.
All the apps mentioned available on @fdroidorg.
I'm more of a #KDE man myself so sadly I can't give a definitive answer, but I understand #kdeconnect is not in fact KDE specific and should be installable just like any other package, regardless of your desktop environment.
I have heard it works on windows as well, though I haven't first hand experience myself.