Using Streamers Without Cues or Reels
Everything that you can set up in a Streamers document is optional, and both cues and reels can be omitted to suit your workflow.
If you don't define any cues, Streamers will still play back any reels in sync with timecode. This makes it useful as a timecode-synced video playback application, and can save time by eliminating the need to re-import video into all of your sequencer's documents whenever a reel change comes in.
Streamers will always respond to MIDI messages your sequencer sends it, so you can add events as MIDI notes in your sequencer. (However, you will need to time-shift any streamer events manually to make them end at the sync point they are meant to hit.)
If no reel is selected, Streamers can work in overlay mode. The output window will become transparent, or show the opaque background you set in Display Settings. You can then move and resize the window to make it cover your DAW's video window. Streamers will still play back any cues you may have defined, and will as always respond to any incoming MIDI messages that match your MIDI trigger settings.
Note: Overlay mode is significantly more processor-intensive than simple video playback. Having Streamers run on the same machine as a DAW can also degrade performance. For best results, run Streamers on a separate machine from your DAW/sequencer.
Also note: If you do use Streamers in overlay mode, the window will move to the topmost level. That is, any visual events rendered into the output window will show up on top of other applications' windows. If a reel is selected or the display preferences are set to use an opaque background, the window moves back down so that it stays above regular windows, but below floating windows (meaning that the video will not cover most sequencers' counter windows, but will stay on top of normal document windows).