NymphCast VS miraclecast

Are you looking for something like this?

A different altern@tive gor media streaming, dimilar to chromecast, is Nymphcast: https://github.com/MayaPosch/NymphCast

Both clients and servers are available, it also works at a higher level.

I've been watching NymphCast for a while now, but I've never actually run it before.

I'm trying to cast any video from YouTube to a RP4 using the Chromecast (DIAL?) protocol. How do you do this? So far I've tried PiYouTube, RaspberryCast, PiCAST, PYCASTER, and NymphCast. All unsuccessfully.

No. You need more apps to support https://github.com/MayaPosch/NymphCast/ you can DIY a home network with something like this. There used to be picast and some other android apps that allowed you to do it (by running android on a system that ran the videos) etc

Don't send me to pre-alpha software like Nymphcast

Edit: maybe micraclecast might help but it seems a bit complex to set up. Seems it doesn't support connecting to external displays yet. So not very useful for this use case.

I tried running Miraclecast on the Linux device, but it requires me to stop the network manager, which isn't acceptable as I need an internet connection to the device.

With that said, there are ways to do it. Miraclecast (see https://github.com/albfan/miraclecast ) is the most well-known Miracast implementation, but I've never been able to get it working - I got it to work as a sink, i.e. I was able to cast to it, but only at about 0.5 fps, and as I said, I was never able to get it to work to cast to another device. It looks like you might need to use a special branch of Miraclecast to do it, and it's a work-in-progress - I'm not sure if it's possible to do at this stage.