They have access to their server settings.
if I have full access to server how can I mange large video file upload?
No, you don’t
your hosting provider does.
As I said before, you can repeat your question another 100 times, but with same answer.
Do you understand the word “impossible”?
any solution for this ?
Change your hosting provider or tariff to one, who allow 100Mb uploads
yes I transferred my site … But cost is high 
anway now what are the modification I have to do from my coding part
Documentation says that post_max_size changeable at .htaccess level.
so, .htaccess with lines
php_value upload_max_filesize 100M
php_value post_max_size 100M
would be enough
but my hosting guys suggesting there is a chance to timeout.How can I sove this?
No, no timeout possible.
to make it faster which command I should use
move_uploded_files() or ftp commands in php?
you should use move_uploaded_file() and you can’t make upload any faster because your PHP script starts ONLY AFTER WHOLE FILE GET UPLOADED.
you don’t use move_uploaded_file() to move a file from client’s computer to your server.
this function used to move a file from one catalog on the server to another.
try to read documentation a bit
I am able to upload.I have a question what is the use of ftp file upload in php? In what situation we can use ftp upload related functions.
no, YOU CAN’T USE FTP FUNCTIONS FOR THE FILE UPLOAD
THe key is we can’t use both at a time http and ftp
The key is FTP functions used to interact with FTP server and your client don’t have one.
Off Topic:
lol