Want upload flv file through php.

1) Is there a limit size for the file to be uploaded?
2) How to solve the page time out issue during the upload.

i need to upload flv files through php, like i uploaded pdf files and images before, but the problem is the flv file sizes.

how to upload a flv file i need a full function to solve this problem for me

plz i need advice ...
thnk for replies in advance