Update README.md

demos/SailboatDemo/README.md

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 # SailboatDemo
 
 [![SailboatDemo V2](https://img.youtube.com/vi/M9_Z5RxW3Pc/0.jpg)](https://www.youtube.com/watch?v=M9_Z5RxW3Pc)
+App video on Youtube
 
-A 3D sailboat on a moving sea surface with waves and all. 
+Delphi Firemonkey 3D app for Windows, iOS and Android.
+
+A 3D sailboat on a moving sea surface with waves. 
 This demo application was added to this fork of GBE3D 3d components, by Gregory Bersegeay. 
-It is a Delphi Firemonkey 3D application. 
 
 Features:
 * SailboatDemo is based on original GBE3D *waterdemo* sample.
@@ -14,29 +16,30 @@ Features:
 * Ocean surface w/ waves. 
 * Boat stays in the center at 0,0 while the sea surface and land are moved (boatcentric universe)   
 * Boat floats on waves and pitches to match wave inclination in Course direction.
-* Objects parented to the OceanSurface float on it (like the boat wake bubbles).
+* Objects parented to the OceanSurface float on and move with it (like the boat wake bubbles).
 * A system of TDummys allows setting boat's *course*, *heel* and *pitch* independently, avoiding gymbal locks by manipulating RotationAngles (Euler angles).
 * A rock with a lighthouse (but no collision detection yet). A few floating objects. 
 * As the boat moves, it leaves a wake of floating bubbles. Bubbles are recycled over time.  
-* One rectangle of sea surface (30x30). Boat automaticaly makes U turn when leaves the sandbox. Todo: a system of tiles.
+* One rectangle of sea surface (30x30). Boat stays in the center. 
 * Large textured TDisk represents the sea horizon.
 * Scrollable listbox contains the app controls: camera, boat, waves and object groups. 
-* Camera controls: AngleOfView or switch to design camera.
+* Camera controls: AngleOfView, Azimuth and elevation or switch to design camera.
+* Mouse drag: up=change elevation, rigth/left - rotate camera.
 * Boat controls: movement, Course, Speed, Heel, jib and main sheet.
-* 3 waves w/ configurable params: Amplitude, Longueur, Vitesse and Origine ( same as TGBEPlaneExtend ) 
-* All assets (3d model and textures) are embedded in the form file (fSailboatDemo.fmx). That is why it is so big.
+* 5 waves w/ configurable params: Amplitude, Longueur, Vitesse and Origine ( same as TGBEPlaneExtend ) 
+* All assets (3d model and textures) are embedded in the form file (fSailboatDemo.fmx). That is why it is so big (25M).
 
-In order to compile this demo, you have to compile and install the GBE3D design package in this fork,
-as I have added a few components.
+In order to compile this demo, you have to compile and install the GBE3D design package *in this fork*,
+as I have added a few components: Sea surface and Sail surface.
 
 ## Windows executable
 https://github.com/omarreis/GBE3D/releases/tag/V10
 
 ## Video
 
-https://youtu.be/M9_Z5RxW3Pc   SailboatDemo V2 on Youtube
+https://youtu.be/M9_Z5RxW3Pc   SailboatDemo V2 on Youtube (jun22)
 
-http://www.youtube.com/watch?v=bBpZxB8GLpg   SailboatDemo on Youtube
+http://www.youtube.com/watch?v=bBpZxB8GLpg   SailboatDemo V1 on Youtube
 
 ![Youtube video](https://img.youtube.com/vi/bBpZxB8GLpg/0.jpg)