I think the emails/videos are going out to all the students who had interviews. I know when I was applying last year, I'd have loved to get something like this! Even though it seems impersonal, it's still nice to know they haven't forgotten about me

Radio silence always gave me a creeping omg I'm out

feeling.
And on the subject of impersonal emails - the admissions decision email is pretty light on info actually. Last year, the email basically said (paraphrased, obviously) "hey there's an update on your admissions portal, you should go check it". Everyone scrambled to the admissions portal to check their status.
If it helps - last year we got our emails March 15th.
'Course that doesn't mean this year will go the same way...