do they do this is the morning also or just 4:30 in the afternoon
Only 4:30 for the lower, aka retreat, of the flag. I don't know when the flag is raised but guess it is done before guests arrive.
I have video from yesterday. I used my camera which does not hold a lot and it is broken up into three parts. This is not the entire ceremony, only parts of it. Also sometimes the Dapper Dans sing, but they did not yesterday.
Part 1 The band coming toward the flag and getting into position. (2 min 13 sec)