You can produce your project to any format you wish, and later use the Youtube uploader, on Youtube, rather than use PD's uploader. Powerdirector only has WMV in the YT module, very limited choices. However, if you still want to use WMV, simply pick one of the many profiles under the WMV tab, not the Youtube tab. I think most of us avoid the built-in YT production module entirely, the only exceptions being Cyberlink contests where you MUST use the PD uploader because it also has the function to upload the timeline to Directorzone as required by contest rules.
HP Envy Phoenix/4thGen i7-4770(4@3.4GHz~turbo>3.9)
Nvidia GTX 960(4GB)/16GB DDR3/
Canon Vixia HV30/HF-M40/HF-M41/HF-G20/Olympus E-PL5.
Tape capture using 6 VCR, TBC-1000, Elite BVP4+, Sony D8 camcorder with TBC.
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