The video compares the Army Regulation 21 Gun Salute for Trump on Capitol Hill with the alleged fake news 21 gun salute for Biden before he arrived at Arlington Cemetery?
This was Trump's 21 gun salute departing DC, looks like 3 second intervals, 4 guns.
https://www.c-span.org/video/?c4939414/user-clip-cspan-21-gun-salute-trump-farewell-speech-joint-base-andrews
Here's Regulation Army 21 gun salute, looks like 3 second intervals, 4 guns.
https://youtu.be/V7ubMiXyn08
Here's Biden's Swearing in on Capitol Hill, no 21 gun salute there, probably bc of the virus, right?
https://youtu.be/ZwvbQR887W0
Here's what the media fake news alleged was Biden's 21 gun salute, but it started before he arrived and doesn't appear to be a Regulation 21 Gun Salute.
21-gun salute held at Arlington National Cemetery ahead of President Biden and VP Harris' visit - YouTube
Here's how fake news ABC dressed it up to make it seem real. Note the reference to 9 second intervals.
President Joe Biden is met with a 21 gun salute at Arlington National Cemetery. #InaugurationDay - YouTube
21 gun salute comes after the ceremony on Capitol Hill, doesn't it?
Look back to Reagan, Clinton and Trump. All had the same salute Trump received, 21 guns, 3 second interval while they were at Capitol Hill after the ceremony.
Reagan
https://www.youtube.com/results?search_query=ronald+reagan+inauguration+21+gun+salute
Clinton:
https://www.youtube.com/watch?v=5X-Xj5UdoT4
Trump:
https://youtu.be/1UXYMPTdC40