I guess if the rocket hadn't disassembled itself, then it could be used again.
I think static fire is part of the testing to proceed to a launch? So, now they have to build another and static fire that as well in order to get back to where they should be.
Much less than if it had actually launched. It burns on the ground, when it blows up in the sky its just pollution. Not to mention all the "venting" that happens during engine relights and coast periods which just means dumping methane and oxygen.
Why does this video repeat the same shit twice? Just let it play past the end and (my client at least) just starts replaying it anyways, so what's the point in sticking a repetition into the file itself? I hope the compression at least results in it not using much more space for the 2nd copy.