As one of Vuo's developers, I work on Vuo's engine (the thing that makes compositions run), work on nodes, and write documentation. You'll see me on the forums answering people's questions about Vuo.
I enjoy using Vuo to make live music visuals. My hope for Vuo is that it will grow into a community of people of diverse backgrounds and identities making lots of different artistic, useful, unique, goofy, beautiful, crafty, wonderful compositions.
Estoy practicando para ser competente en español. Si publicas en el foro en español, trataré de responder en la misma manera.
When my coworker and I tried the stream, it played for a little longer on our computers but not much. 15 seconds at most.
There's nothing special about this stream that we know of that would prevent it from working in Vuo. It's actually RTSP-over-TCP, so that shouldn't be a problem. I'm able to play it with the ffplay command-line tool in the latest version of FFmpeg (4.3.1). (Vuo uses the FFmpeg library to play RTSP videos.) Possibly we need to update our FFmpeg version, or perhaps there's a bug in the way our code is using FFmpeg.
I've converted this discussion to a bug report and updated the title. Thanks, jandraka, for letting us know about the problem.
The simplest workaround would be to leave the Window port of the Arrange Layers in Column node unconnected. The Window input is only needed if the layers to be arranged are Real Size layers, which the slider layers are not.
As you figured out, the problem has to do with subcompositions. In the original composition, the Arranged Layer output port of the subcomposition is a trigger, which fires events whenever any of the Make Slider nodes do. Adding the Window cable within the subcomposition changes the Arranged Layer output port so it's no longer a trigger. Within the subcomposition, the events fired from the Make Slider nodes are now blocked (because they overlap a published input's event stream). Instead, the Arranged Layers port now outputs the Window events.
Although there's room for improvement for clarifying event flow through subcompositions — for this specific case, maybe the best solution would be to avoid the problem by removing the Window input from Arrange Layers in Column. The reason it needs the Window port is to calculate the layout for Real Size layers. But if it could defer the layout until render time, then it would no longer needs the Window port.