1) You can upload a php.ini file locally into your root directory and can assign the maximum file upload size.

2) Uploaded video files will be there in the 'video' folder under public_html directory.

3)

You can enable payment option in

Admin > System Settings > Service Type

Once you done this, if you have any existing members, they are asked to pay. New users have option for signup for trail account, they will be asked to pay once the trail period is over.

You can create packages with following limits

1. Duration
2. Number of video allowed to upload
3. Storage Size

4) After login to Admin area, you will be able to edit the Title, Description, keywords etc...