I am currently using Evernote as my memory appendix to harbour whatever I digitally read.
I find that what the video is demonstrating is a long unnecessary workaround.
To go from Evernote to Papers2 you can easily option click and select "open with...".
I believe a real integration would be a Papers2 button like "send to Evernote" among these:
Speaking of Papers2: the "Livfe" feature hasn't been launched yet. It's two months I am waiting for what seemed to be the most exciting new feature of the new mekentosj product.
Pro tip 2: to annotate pdfs I open them from Evernote to Skim (for mac).