I’d not bother with the trip to .wmv. I’d assume what ever format you are recording in would be less taxing then trying to edit .wmv.
You have a decent computer so power through.
If you need to convert people seem to be happy with Avids free DNxHD, Cineform, or MXF.
If you are going to youtube stick with 1280 x 720 Minimum. HD is king on Youtube without it you will loose views.