Video was captured before Capitol riot and Trump's speech
Shortly before the pro-Trump mob stormed the Capitol, the president delivered comments at a rally at the Ellipse, urging his supporters to walk to the the Capitol to "cheer on" congressmen who were about to certify the Electoral College results.
In the clip, the Trump family is seen laughing, dancing and joking while watching monitors. The viral video was taken before Trump's speech; the monitors show the crowd waiting in front of the stage at Freedom Plaza for Trump to come out.
The screens shown in the video do not show any rioters storming the Capitol nor any violence.
Also playing in the background of the viral clip is the 1982 song "Gloria" by Laura Branigan, which Trump frequently plays ahead of rallies. A YouTube video of the entire speech reveals that "Gloria" was played at the "Save America Rally" before Trump took the stage, further indicating that the video was taken before his supporters stormed the Capitol.