obs: add page (#3926)

pages/common/obs.md

@@ -0,0 +1,32 @@
+# obs
+
+> Open Broadcaster Software.
+> Video recording and livestreaming program.
+
+- Launch OBS:
+
+`obs`
+
+- Launch OBS in portable mode:
+
+`obs --portable`
+
+- Automatically start recording a video on launch:
+
+`obs --startrecording`
+
+- Automatically start the replay buffer on launch:
+
+`obs --startreplaybuffer`
+
+- Automatically start streaming on launch:
+
+`obs --startstreaming`
+
+- Minimise to the system tray on launch:
+
+`obs --minimize-to-tray`
+
+- Make the log more verbose (for debugging):
+
+`obs --verbose`