A video of the Su-57D's first flight has also appeared.
https://reddit.com/link/1thwol9/video/o26rrol3652h1/player
BTW, on the Su-57D's vertical tail you can see an interesting drawing — the two-seat Su-57D itself, the S-70 Okhotnik, the Su-75 Checkmate, and two unknown munitions.
One of them looks like a glide bomb, and the second looks like an aeroballistic (or anti-radar?) missile.