If you adjust the saw so the miter slot is parallel with the blade and the
per the video, the fence should be aligned with the miter slot and the miter slot is parallel to the line of cut. The band portion of the blade is centered on the upper wheel. By doing the test cuts you can then check the table alignment to the blade. This eliminates drift, so there is no need to adjust the angle of the fence.As the video says, you generally only have to do this once. We all tune up our table saws, yet we don't generally do that with band saws, but we should.