2.0: Why not place the T flat? I find placing the first few blocks flat gives more opportunities for the next few blocks. Not doing so means you get the awkward L situation later. Once you had that situation, you should have fixed it immediately with the other L, because you ended up needing the I.
9.0: With a 4-wide 1-deep hole, with S, Z, and L coming, I'd have held the S, laid the Z down, put the S back on it, and the L vertical on top of the S for a flat stack. It uses hold twice (3 times to get an I back in hold), but for the flatness of stack, I'd do it. I know others wouldn't. It's that kinda pattern which I'm able to see and execute at 4pps+. You didn't get in trouble for it, and you might have had a different pattern in your head (I'm slower at seeing opportunities to put the L/J in the kneeling position leading to the O placement, and so won't do it much.)
12.3: With an L and J coming, I'd have laid the Z down flat to avoid the awkwardness which ensues when you don't do so.
18.0: The flat L is so lovely as a border for the right well. Y U NO PLACE IT THERE, with those Ts coming!
22ish: Here's a case where I definitely would have held, and would advise others to as well. An easy L onto J placement for a kind field was wasted because you didn't hold, and you wasted more time working out that field than you gained from not holding.
24ish-35ish: Nice skimming, but I'm sure you can see that with more thoughtful play about which borders to make, and stacking pieces on their flatter ends, you could have avoided it. e.g. the L really should have gone on the right at 24...you'd have had to hold the Z, but it would have led to less awkwardness, and no need to skim, which imo saves more time thinking than hold spends. Anyway no more banging on about hold henceforth.
28: T should have gone on the left to allow the J to kneel on the right, to make a nice border for the I column.
31: I should have made a Tetris, for the T to go on the left for the nice T-->L pattern, where you see a _-_ stack of 3.
44: O should have gone on the right.
45: If you'd have used the J in kneeling position, rather than for skimming, you'd have got an easy use of the S piece upright on it, for a flat stack.
48: Not sure why you didn't place the T on the left, and then the O in the gap where you placed the T.
51.5: If the Z goes upright on the left first time, rather than 2nd, then you might have got out of that situation you got yourself in due to not holding.
56: I didn't notice this at first sight, but the way to get out of that situation is placing the S 2 spaces to the right. Then you could have used the L and J upright for a flat stack.
1:08: The reason you got into a pickle was the flat L placement, where I would have noticed the Z coming, and placed the L kneeling, leading to a flat Z placement, and an easy way out of the struggle you got yourself into.
1:12: I'd have placed the T 2 to the right, the other way round, to give you space to put the S down.
1:23: Where you've got a 3 high 3 wide backwards gamma hole, with the bit on the left flat (imagine the top side and right side of the O piece), you should instantly see that the J goes belly-down, right in time for the L upright on the right.
1:27-8 - good stacking
1:31 - something you might not see instantly, but if you'd have placed the T with its back to the left, point to the right, you could have put the L kneeling down, creating a nice space for the Z to go into it.
1:35 - you probably see it now, but putting the I on the 2nd to right column leaves easy spaces for the J and L to fit into.
1:44 - that was a nice spot to use the LJO. I didn't see it until you did it.
1:52 - anything but that tempting L placement would have been fine. The Zs would have both gone upright to raise the L hole by 2.
1:58 - if L kneels on the left, you've got the 2 Js sorted by putting one belly down for the other to stand, leaning on, as well as a space for the Z. What you did was fine, but it demanded another L which was not coming in the next 6 pieces. It also meant you used the Js not on the left, but on the top of the stack, where they don't solve anything, and just create an O drought which didn't need to happen.
2:01ish: You now probably see that glaring J placement needed desperately to be filled.
2:14ish: You seem to make a habit of placing pieces which demand other pieces, or the same piece. That L placement now demands an L, which is not in your near previews. It's good play to make a play demanding a specific piece which is in your previews, and that's one of the biggest keys to getting a very fast time, but it's equally bad to demand a piece not in your previews, which you just did. At 2:13 you could have avoided that by putting the S not in a skimming position, but with its back in the 4th to right column, to demand that L piece upright in the 2nd to right column, which then would have left you with an easy stack.
2:17 - Z flat on the left solves your problem. It's an excess piece because that part of the stack is already 10 high, but it's better than forcing a soft drop-->zangi. Then you'd have had an easy J standing up on the 2nd to right column, straight for the O and the L leaning on the O.
2:19 - haste to finish the run meant you messed up where you might not have otherwise. I goes 3rd from the right, and then use the 2 Ls upright in backwards gamma position to finish off the run. I think you kinda realised this at 2:20 and then did it anyway, when laying it down in the centre for the Z to go on might have been a better use, especially with the J-->I coming soon. Anyway I'm sure you can work out what you could have done with your pieces at the end to minimise your piece count.
on the basis that I'm fair game, I played a round with your exact pieces myndzi:
I've uploaded my replay here
...in the middle I went on a massive rubbish hold spree, as well as a few other errors which I know happened... I wouldn't usually do those things, but I guess that comes with not having played for a while, and not warmed up...but lol here it is in all its awfulness. I held more than I usually would because I think I was thinking about hold at the time, and how it might solve my stack. Something like that anyway. It might help someone, I guess...