Among NIKON, CANON, SONY digital cameras which will be better?

I want to buy a digital camera and confuse to buy which model and why among CANON, NIKON, SONY, SAMSUNG? So please reply me which brand will be best in digital camera with video recording and with merits. Please answer me soon.

All are good brands so you could buy any with confidence. The choice would be in price and suitability of specification and general handling for your own use. Sorry, there's no definitive answer.

Depends on your budget. All reviews point out Canon 7d with excellent video is good value. Good strong camera with many lenses to choose from. Have a look at reviews just Google Digital Camera reviews. But be warned there are many many sites it will become confusing. Firstly work out your budget, then functions, weight, accessories, and off course reputation along with service.

Among all these i will suggest you to go for canon if you want very good image quality. Canon tops in its market share comparing to other camera brands.
http://digital-camera-photography.blogspot.com/2011/01/sony-cybershot-vs-canon-digital-camera.html

You can consider Canon EOS Rebel T1i 15.1 MP CMOS Digital SLR Camera
* New 15.1-megapixel CMOS sensor with DIGIC 4 Image Processor
* Full HD video capture at 1920 x 1080 resolution; HDMI output
* 3.0-inch Clear View LCD; Live View Function for stills and video
* Capture images and video to SD/SDHC memory cards