[Plugin: JW Player for WordPress] Is it work with 3.3?

it work, but you have to install manually.
– download from www.remarpro.com
– upzip to your plugin folder
– activate plugin

When I installed in on 3.3 with debugging on I got this message:

Notice: wp_register_script was called incorrectly. Scripts and styles should not be registered or enqueued until the wp_enqueue_scripts, admin_enqueue_scripts, or init hooks. Please see Debugging in WordPress for more information. (This message was added in version 3.3.) in /wp-includes/functions.php on line 3587

It still works but it looks like they need to update some of the ways they are enqueueing scripts or styles. Maybe related to this issue: https://wpdevel.wordpress.com/2011/12/12/use-wp_enqueue_scripts-not-wp_print_styles-to-enqueue-scripts-and-styles-for-the-frontend/

Yeah, that error message is a known issue with 3.3. We’ll be releasing a compatibility fix very soon.