Everything from installing the plugins to your first automation, written step by step so you can go from curious to live in a single afternoon.
Before you download anything, it helps to picture where each piece the pretty. The aitum tv site is the single front door for the whole thing: the free plugins, the vertical plugin, and the app you add on top. Roughly the order runs: install OBS Studio if you have not, grab the vertical plugin and the multistream plugin, configure one output to learn the shape, then step in with the app once the piping feels stable.
Your patience will thank you for that order. A lot of people stall by trying to configure everything at once. Resist that urge, because a working simple setup beats a broken perfect one every time.
Grab the right installer for your platform, run it, and open OBS. Under View and then Docks, turn on vertical scenes, vertical sources, vertical scene transitions and vertical body. From there you add your first scene and a couple of captures the same you add a normal scene.
The nice part is that your existing sources can be borrowed into the vertical canvas, which means less re-tuning and a lot less duplication than you might expect.
Once the vertical scene exists, right-click it, choose linked scenes, and tick the matching horizontal scene. Do the same for every pair you own, so "just chatting" on one side always finds its partner on the other. Then open the vertical settings, head to the streaming tab, and paste the stream key for your target portrait platform. Bind a start and stop key and you are ready to broadcast both faces.
Bind a save-backtrack hotkey. It grabs a saved clip from the last few seconds, perfect for pressing the moment a hot viewer moment lands.
Test one scene swap on the main canvas first. If your vertical scene shifts to match, the link is solid and you will not notice a mismatch while you stream.
In the multistream settings, click the gear and add an output for each platform you want to reach. Each drops pre-filled with the fields the service expects, so you are not digging for a stream key mid-stream. Give every output its own bitrate, encoder and audio tracks, then save. The plugin shows all your broadcasts side by side, so at go time you can start them all at once or pick just the ones you like.
Begin with two platforms and confirm the upload feels healthy. Then add one more. Because it is your own bandwidth doing the heavy lifting, you will quickly see how many you can carry without the feed dropping.
Keep each bitrate matching what that service actually expects, not a wild number you hope impresses. The stability of the connection is what keeps an audience.
Open the app and build your first rule with one trigger and one action, just to get the shape into your fingers. A clean starting point is a Twitch follow that fires a welcome message in the chat you run. It is small, it is honest, and it proves the engine handling works.
From that seed you add layers. A light flips when a gift lands, a scene swaps while you are deep in the game, a room is tinted by a channel point. The pattern never changes, only the ideas grow.
The first stream will feel different: less reaching for the right panel, more looking at the people watching. That is the stay worth grabbing after half an hour of setup. Start with the vertical corner or a single multistream top, either road ends at a broadcast where your attention sits where it is meant to be.