What version of Premiere Elements and on what computer operating system is it running.
Premiere Elements' built in YouTube feature does not have a preset for an upload from there using a frame rate of 60 progressive frames per second.
I am assuming that your "60 fps" = 60 frames per second and not 60 fields per second (representing 29.97/30 frames per second).
What you will need to do is export your Timeline to a file with a 60 progressive frames per second frame rate. And, from its hard drive save location,
you upload the file to YouTube at the YouTube web site.
If consistent with your project, a suggested export might be (for NTSC set up and project settings for 1920 x 1080p30)
with Presets = MP4 H.264 1920 x 1080p30
then under the Advanced Button of the preset, you customize the preset so that it is for MP4 H.264 1920 x 1080p60 instead of p30.
Please supply more details so that we can customize the reply to what you are actually using.