I wanna share with you guys this damn nice mod in order to performe the similar result as the video above. I'd fail few time and now finally success. I'm kinda happy.
I'll try made it fast as I gonna sleep soon, and step by step go do it.
My PC Spec:
IGN: c y k o h 7 7
CPU: Intel C2D E5200 only
GPU: 386Mb Gforce 9800GTS
RAM: 4Gb
OS: Windows 7 Ultimate 64bit
Minecraft version 1.2.3
Most of the item I disable and set to minimum, but getting pretty good result.
Step 1: You need to have a clean minecraft without any mod, esp the minecraft.jar file
Step 2: Choose the right OptiFine HD from HERE. Try difference edition may result different outcome. Ref: http://i.imgur.com/C7CkN.png
Step 3: Forget about the Magic Launcher (I feel it's a waste of PC resource), just do a MANUAL installation of the OptiFire
Step 4: After OptiFine install, you have to install Sonic Ether's Unbelievable Shaders v1.2.3 v06 from HERE
Step 5: Download it and just use the INSTALLER.exe to auto install into your MC.
Step 6: Run Minecraft as usualy and go into your OPTION --> Video for more setting.
OK..It's done...and you may enjoy the breeze with the grass and leaves, the shadow, the lighting effect....it's wow.... if you PC "POWER" enough, probably can consider the Water Shader Mod.
NOTE: after install the Sonic Ether's Unbelievable Shaders, pay attention to the site given. There're Ultra Shader, Default Shader, and Lite Shader to suit your PC.
Good luck. Discuss here if we've any problem.