What settings are you using to output your video?
In version 13, your video for YouTube should be output by selecting Publish & Share/Computer/AVCHD with the preset for YouTube HD.
This will produce an MP4 that's optimized for use online, but will also play and look great using Quicktime Player or VLC Media Player.
Premiere Elements 13 on what computer operating system?
What are the properties of the Timeline content? What are the exact details of the export?
What are you using as the Save In for the export and how much free hard drive space is at that location?
What player is giving you the message that this Premiere Elements export is not supported?
Please clarify, does export a portion of this 2 GB file export correctly?
Let us start here and then decide what next based on the details in your reply.
I'd appreciate your allowing me to have a conversation with the poster before you crowd in, ATR. You can certainly feel free to step in when I'm no longer able to help, but once in a while I'd like to be able to offer my assistance too. Thanks.
Look at the timing of your post (8:18 am) and mine (8:20 am). Your post was not visible in this thread when I posted my reply to this user's seemingly urgent PLEASE HELP. I had no way of knowing you had posted. Consequently, your remarks on this one are without foundation and uncalled for. Under the circumstances, I will be available for help for this user in this thread as asked by the user.
I post only when I have something relevant to contribute based on the details supplied by the person posting the thread.