at 5:58 Why re-invoke voting on old post? Is the vote burned? Does the author get a reward from past payout votes now?

The vote does nothing to the rewards, but the voter does "burn" some voting power. It's almost exclusively an UX change so that people can vote as they want.

at about 9:20: One and a half months til hard fork so around middle of June? I like the whole month idea for people to test then the two week warning to the exchanges.

Yes around june.

at 27:30, that left me a bit confused code freeze and testing to start Wednesday then two weeks notify exchanges, a little bit different than earlier in the broadcast.

Yes, we decided to add some last minute small features (hbd interest only on savings) which pushed the date by two weeks.

Sounds like RC issue still may be up in the air for this hard fork, but also sounds as if progress is being made and I like the keep it simple attitude and then if needed make adjustments.

It was decided to not put it to this hard fork but more about putting it as a soft fork (25.1 basically)

Did the blocking of votes on old post cause issues? I do not understand why the return to votes on already paid out post.

I don't remember why it was blocked @blocktrades can probably chime in, I think it had something to do with hivemind.