No way are you going to upload a 12.5 GB file to YouTube from within the Premiere Elements project.
So, I am assuming that you are creating a file to upload to YouTube at the YouTube web site.
Please check out the following
If you have produced a 1080p file in Premiere Elements, you have 1920 x 1080 at a progressive frame rate.
Can you verify those properties before any upload to YouTube? You should be able to.
What YouTube does with the video uploads is in accord to its procedures.
Well, how should I upload the file then? Should I not create a file and just upload from the video editor, or should I make my videos shorter?
You are going to be bound by the upload limitations of your exports. There is no way to extend the Premiere Elements 12 Publish+Share/Social Websites/YouTube limitations of file size 2.0 GB/15 minutes. However, if you take your Timeline to a file, you still have to deal with YouTube at the YouTube web sites. You can get extended limitations there that you cannot get through the within Premiere Elements upload route.
Of all the export choices from Premiere Elements, probably the smallest file size would be expected from a Publish+Share/Computer/Windows Media export (see customization under Advanced Button). But, even there a 12.5 GB seems even much for YouTube to OK. But, I do not know how far YouTube will go with these special accounts with extended limits.
Although Facebook and Vimeo do not show limitations in the Premiere Elements Social Websites feature, they appear to have them. See their web sites for further information on that.
Will decreasing the duration of your video compromise the video message that you are trying to convey with your presentation? Can you get your messages across in a series of shorter videos?
Have you looked at the Windows Media and AVCHD .mp4 choices under Publish+Share/Computer?
So, your saying that the video was rendered correctly... However Youtube doen not support the length of my video with the high quality I have.
Youtube only makes 15 minutes of video at 2 GB
So in order to get 1080p I sholud shorten my video to about say 1 hour or even shorter than that.
Also I am not publishing to YouTube directly from Elements 12. I am creating an MPEG file from the Publish+Share/Computer part.
Actually, now my video has been put in 1080 p, but it just took a while for it to change, like a day or so. So, it changed, with the way that I did it, it worked.
But is there a faster way to change it, and will making the videos shorter make it go faster?
Sounds like major progress. Great.
You might want to consider exporting your Timeline content to
with Presets = MP4 - H.264 1920 x 1080p30
I am not sure how long it takes YouTube to finalize a video for display as well as for upload. But, you might want to do a mini test run with your project as is and then another version with 1/2 the content. Then determine if there is any difference between the two with regard to the upload process and the time to finalize a display set of 1080p.