@Lash,
There are thousands of people who have heard those speeches, so go ask them. It seems like lots of people want to fantasize about what is in those speeches but no one wants to actually find out by asking someone who was there.
It seems like Sanders is losing everything he has gained. The only Sanders story in the press these days is "when is he going to endorse". No one is talking about his platform and when he tries to talk about it, the press moves on. Were I Sanders, I would pick a select few Senate candidates in battleground states and start campaigning for them. One slam on Sanders voters is that they came out and voted for Sanders in the primaries but then didn't vote for progressives down the ballot. If Sanders helped tip two or three Senate races to the progressive side, he'd have a lot of clout in the next Congress. He could also start building a "Bernie Block" of votes for progressive legislation. (I just made that term up, so if it's everywhere in five years, it started here!)