That is good dirt by what I can see. The bucket test is fail safe as long as you are planning to rent a sheepsfoot roller or vibratory compactor. Now, if you are going to doze it in and wait for it to fill, that test is less indicitive of accurate results. Without compaction, you should pick up a natural clump of clay about the size of a soft ball, then drop it into a pail of water. If you wait a few days and the clump is mostly intact, you are in good shape. If it disintegrated and is no longer the basic shape you could have a problem. It should be almost the original size. Bad or sandy clay will fall apart into various sized clumps, nothing like the original size. But from what I see, your soil looks good.
