I'm a big fan of Amazon Prime -- me and the wife order enough stuff from Amazon each year that the waived shipping charges justifies the membership price.
As far as the free video goes: if you think the Prime membership gets you free access to the entire video collection, then you're gonna be disappointed. But there's a good amount of free videos you get to watch, plus some stuff that's not available on Netflix (original series like Alpha House and Bosch are worth checking out, plus the first 2 seasons of Orphan Black and the Americans).
Then there's Prime Music -- lots of free music to stream. In one shot, I had access to a bunch of classic rock albums (Eagles, Kansas, Journey....stuff I always liked, but maybe not enough to drop the coin on).
Been a Prime subscriber for the last 2 years, and I intend to renew. If you're on the fence, I believe you can sign up for a 30-day trial.