Hi,
What is your budget? For social networking and youtube purpose any point and shoot camera is ok. Here could be options
These are the options below:
CASIO EXILIM EX-G1.......................$164
OLYMPUS Stylus Tough 3000...........$230
Fujifilm FinePix XP10........................$154
Pentax Optio W90............................$300
Sony Cyber-shot WX5 DSCWX5........$300
Now, I personally like pentax for its quality. It is great and better than other especially this sort of point ans shot camera.
OPTION: If you have hidden desire inside you for photography in future, please consider these with some extra money:
Pentax K-x
Nikon D3000
Canon 1000D
Nikon D3100 (letest and best)
With few more buks you can get Canon 550D which will give you both quality image and video with MIC input. I use this and it is just just just great.
Thanks