I’m using WordPress Video Plugin, found here:
http://ww.wp.xz.cn/extend/plugins/wordpress-video-plugin/
The shortcode is [*videotype* *videocode* Hsize Vsize]
For example, to post a YouTube video, [youtube abcd1234 520 390]
Thanks for the quick response.
I had this problem on my site. I fixed it by doing 3 things:
1. Deactivated and deleted the plugin.
2. Used phpMyAdmin to edit the database:
a. Dropped ‘wp_useronline’ table.
b. Deleted all rows in ‘wp_options’ containing ‘useronline’ in the option_name.
3. Reinstalled the plugin.
All is well now, but, of course, the data has been lost.