The kid took the video that weekend of the 10th. The "announcement" is not about the 1000 Model S reservations, nor is it directly about the loans.
The "big announcement" is about a "big deal" that is likely an investment or partnership.
Since this is the sort of thing Tesla should want to announce ASAP (in order to boost confidence in their financial viability and gain more credibility wrt the Model S), the delay suggests that there are some last minute negotiations and details being ironed out.
In the last week of April, the announcement
was expected in "a few days".
Last weekend it was expected "Monday or Tuesday".
The latest I'm hearing is by this Tuesday. I guess we'll see.
Hopefully everything works out.