Disclaimer: I'm a seasoned low level obi-player. So my words are not advise, just my mere observations.
Firstly, I have also similar problems so it's easier to said than done of course, don't get me wrong.
Secondly, I'm surprised that they allowed you play with that shoes, not just for speed and injury risk, also they can mark the floor. Even the barefoot is better, at least hurting your ankles would be harder.
My observations from your footage:
1st Receive: (around 00:24)
View attachment 32141
The ball is at middle of court already, direction is wide forehand, you haven't moved that yet. Maybe you focused too much on spin, forgot to look at the direction and depth.
A small adjustment step needed to the right. Then a step with right foot into the table due to the ball is coming short.
View attachment 32143
At this point you already late, way too far from ball, hardly reaching. And you are trying to send ball back cross court in front of your opponent who also not ready actually, just watching ball. Of course ball goes long and high. (Red arrow)
Alternatively, at least if you have tried to send ball back to his forehand (parallel), he won't be easily attacking you, and also you already touching ball from left so, you would have more control on ball while sending. (Green arrow)
2nd receive (around 00:46) (there are couple more points with same serve)
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The opponent, hits ball edge of table and fast, most likely it will come long. Then ball passed the net, you still haven't moved yet.
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Then after even you are close to table, and ball is fast top spin, you are lowering your hand like it's heavy low backspin (even though we should lower with body first).
Of course, you can't touch ball from above and touching from below and makes the ball pop.
Actually you are doing left step after hitting but still good that you've made reset and try to ready for next ball.
3rd FH serve receive (around 02:16)
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The ball is coming to wide forehand already passed net but you haven't moved yet,
Your right foot should be at the tip of red arrow.
Then ball touches table, you are late, even with your huuge backswing, you manage to hit but week return, point is lost.
When you were late, you could have much shorter stroke or receiving farther and squatting down, making slow short spinny topspin would be better return (which may buy you a time for next balls, recovery, harder to attacked by opponent)
4th receive FH (around 2:29)
View attachment 32156
The opponent makes side spin to forehand, the ball has passed the net but still you haven't moved a bit.
Right foot should be around the tip of red arrow.
View attachment 32158
When the ball hit to your side of table, you are making huge backswing again while you out of position, which makes you late and harder for timing. Also ball has side spin to wide FH, which harder to catch from your position.
Then ball passes almost you, eventually you miss the ball.
Alternatively, even you are late, you could have a jump to right (Yellow Arrow) while or before backswing,
then with shorter backswing, instead of hitting to cross court (the opponents BH),
you could aim to his FH (parallel) (Green arrow), which would be
- harder for your opponent,
- easier to countering incoming spin
- easier to hit from your position.
Summary:
- You could try to anticipate not only spin, also depth, position etc.
You may try to adjust spin at latest point with your wrist action, but if you are out position it's harder to execute decent shot.
- More footwork, small adjustment steps as soon as ball leaves the opponent's racket.
- Avoiding excessive strokes (still not doing half strokes), if you are not confident at your position, timing etc.
By the way, you are much better at footwork and anticipation at 3rd and 4th balls, probably stressing about your opponents serve etc.
End note:
Please fellow members and TT gods forgive me if I made a mistake, I just wanted to share my humble opinions.
