VDRAVES
I think that you are overlooking what you already have with regard to a Vimeo HD preset for export to file for upload of the saved file at the Vimeo website.
Please see
Share/Computer/AVCHD with Presets = Vimeo HD
Under the Advanced Button/Video Tab, you can customize the preset further from 1280 x 720 to 1920 x 1080 and increase the bitrate, if necessary, to a level that does not give you a prohibitive file size. With Profile = Main and Level = 3.1, the bitrate range is 0.19 to 14 Mbps (megabits per second).
I would start with the default bitrates of Target = 8 Mbps and Maximium = 9 Mbps and explore and experiment from there.
If you customize the preset to 1920 x 1080 in the Export Settings customization area, then change the Profile to High and the Level to 5.1
When you do that the bitrate range will be 0.19 to 300 Mbps instead of 0.19 to 14 Mbps.
In all cases, watch for file size versus bitrate versus quality of end product.
Please give that a look and then let us know if the above resolves your Vimeo and Facebook question.
Please review and let us know the outcome.
Thank you.
ATR