It didn't look like your back was ever set before you lifted.
You have survived, so it wasn't that bad.
It didn't look like your back was ever set before you lifted.
You have survived, so it wasn't that bad.
Take also a closer look to the downward path of the bar, this should be vertical.
Please submit sets of 5 for form checks. And yes, you're back was not set properly. Work on really squeezing your chest up and getting your back flat.