I see you have trouble with the cronjob.
Set it up as "wget" and not php!
Like this: /usr/bin/wget www.yoursitename.com/components/com_community/cron… >/dev/null
2>&1
That will work for you, but video upload will still don't work in jomsocial! There is a major error in the software, and support can't resolve that problem. More than you and me have the same problem.
Using WGET to run a cronjob PHP
I tried to do a cron and run a url every 5 mintues. I tried to use WGET however I dont want to download the…
Setting Up Cron Job - JomSocial Documentation