Opinion is divided and it's extremely difficult to test. Embeds and embed views most definitely count but backlinks is a bit more difficult to measure and it assumes some connectedness between G and YT (which are most likely run as completely separate business units).
If you can create backlinks easily then I would say go for it, if for no other reason than to get free views. eg. if you do some xrumer blasts then, assuming YT doesn't take your vids down for complaints, you will get a bunch of autoplay views on your vids from people on forums checking out your links. And as we all know, view count is pivotal in getting YT vids to rank.