I have a web site that is created in flash.There is a link for upload images and videos .I want to create this uploading module for this link.There is also a requirement that the images and videos which is upload to the user created folders or albums like orkut image uploading.The video should be maximum 5-6 minutes.
I want a brief answer for this problem ,because i am a new comer in web application.If any one can please help me. Thank You..
If you're fresh to this you will need to decide on some server-side technology. Probably in your case I'd recommend taking a look at PHP (it's possible your host already supports this). Google 'PHP file upload', there are plently of tutorials. The fact that your website is in flash with complicate things a little bit though.
UPDATE
I've just read your comment re ASP.NET (woudl have helped if you'd included this in the question). So in this case google 'ASP.NET file upload'.
upload module client
Take a look into Flex FileReferenceList to sort out how to upload files using Flex/Flash.
upload module server
You will then require some server logic to save the file, this can be done in a multitude of ways but as you are using ASP take a look at CopyFile. Were you using PHP server you would use something like copy.
length of video - size versus time You really can't get hold of the video lenght until the user has uploaded the whole file. Thus it's generally more interesting to limit the upload to a fixed size, say 50Mb. That said you can take a look into getID3 that will be able to read a lot of info about the uploaded file (once it's uploaded). You could then use that to limite the size.
Just one last note. The thing your trying to achieve is a fairly complex task and, as you say, you are new to web-development. If your feeling overwhelmed by the whole thing try to split it into very tiny projects and work them up one after the other.
Hope it helps!