Embeeding video and adding files

The video loaded!, but do not allow multiple values, that generates an error, I need select NO allow multiple values

I have a error:

Warning: Invalid argument supplied for foreach() in /home/unintern/public_html/pruebas/components/com_flexicontent/classes/flexicontent.fields.php on line 328

the site test is:

www.uninternet.org/pruebas/index ... carreras12

PD: I can't charge the file since my computer, I change permisions but the window pop up only shows add of url

About uploading file you need to give the "upload file" permission to the user group of your user
e.g. if the user belongs to the "author" user group you need to give this permission to the "author" user group.

About multiple values for video plugin, you could try another joomla video plugin, now you know how to make it work, of course you will need to enter the format of the other video plugin, in the field parameters

Regards