Howdy @miseryhunting
On Picarto there is no log of past streams for viewers to watch. The stream is only active when you are actively streaming using the Open Broadcaster HOWEVER! Open Broadcaster dose automatically record your streams so if you like you can edit and then post your stream on any media sharing site (like facebook or youtube)
The most important thing to remember about Open Broadcaster is to get your "windows" set up in the correct order.
Right click in the "Sources" box and under the "Add" tab will be a Window Capture option and a Monitor Capture option.
The Window Capture will allow you to choose a specific program (Sai, Photoshop, ect.) and will only show tabs you open in that program during the stream. This allows you to open your web browser or other programs without blocking your watchers view of what you are currently working on.
Monitor Capture will record and stream anything and everything that is currently on your monitor, which is fine if you are working in multiple programs and you want to showcase that but it can get messy if you have a bunch of applications open at the same time.
You can preview what your stream will look like without going "live" by clicking the "Preview Stream" button. You must press this button again before the option to go live will become available. When you are ready to stream for the whole world to see click the "Start Streaming" Button and you will notice that at the same time the "Start Recording" button will also click on.
You can record your monitor without going live if you like and you can click the "FILE" tab at the top of the Open Broadcaster application and click on the "Open Recordings Folder" if your are not sure where Open Broadcaster is saving your streams.
Does this information help?