digital media

D V D

Disc capacity	DVD-video	Blu-ray
DVD5s, also known as "single layer DVDs" DVD9s, also known as "double layer DVDs"	single-layer (4.7GB) dual-layer (8.5GB)	single-layer (25GB) dual-layer (50GB)
Maximum data transfer rate for movie playback	11 Mbps	54 Mbps
Players & Recorders	NTSC, 720x486 non-square pixels SECAM, PAL 720x576 non-square pixels

HDTV

Screen Resolution	720p	1080p
horizontal x vertical pixels	1280 x 720	1920 x 1080

H D M I

HDMI 1.0 was released December 9, 2002 and is a single-cable digital audio/video connector interface with a maximum TMDS bandwidth of 4.9 Gbit/s. It supports up to 3.96 Gbit/s of video bandwidth (1080p/60 Hz or UXGA) and 8 channel /192 kHz/24-bit audio.
HDMI 1.1 was released on May 20, 2004 and added support for DVD Audio.
HDMI 1.2 was released August 8, 2005 and added support for One Bit Audio, used on Super Audio CDs, at up to 8 channels. It also added the availability of HDMI Type A connectors for PC sources, the ability for PC sources to only support the sRGB color.
HDMI 1.2a was released on December 14, 2005.
HDMI 1.3 was released June 22, 2006 and increased the single-link bandwidth to 340 MHz (10.2 Gbit/s).It optionally supports Deep Color, with 30-bit, 36-bit, and 48-bit xvYCC, sRGB, or YCbCr, compared to 24-bit sRGB or YCbCr in previous HDMI versions.
HDMI 1.4 was released on May 28, 2009, and Silicon Image expects their first HDMI 1.4 products to sample in the second half of 2009, increases the maximum resolution to 4K × 2K (3840×2160p at 24Hz/25Hz/30Hz and 4096×2160p at 24Hz. High Speed HDMI 1.3 cables can support all HDMI 1.4 features except for the HDMI Ethernet Channel.

Free software to rip and backup your DVDs

How to save youtube videos to your computer

Open windows explorer and go to Tools > Folder Options > View and select the options "Show hidden files and folders" and de-select "Hide protected Operating system files"
Open "My Computer" open "Documents and Settings" directory(mostly in C drive) and open the directory corresponds to your User name.
Open Local Settings > Temporary Internet Files > directory
Delete all the files in this directory(You can actually avoid this step, this step is just to make your job easy, to easily identify the file which we have to download)
Open youtube.com website and open the video you want to save.
Play the complete video once
Go to the "Temporary Internet Files" directory, You can see many files that are part of the WebPages you opened recently saved in this directory
Copy the entire directory to Desktop or some other location as your search will be easy if the directory is copied to new location
Open the new directory, and check each files. The video file you are looking for will be in size of MB's(depends on the length of video)and with an extension ".flv"
Open all the shortlisted files with a flv player