rear axle pinion bearings advice needed

rear axle pinion bearings advice needed VIDEO

VIDEOI have searched and only come up with leads to upgrades, no real technical information. can anyone point me in the right direction to replacing my rear pinion bearings? I'm looking for the service procedure and parts sources. I'm not looking to upgrade. just repair it. it's an 04 4x4 big tow non locking rear. I'm having a him on decel, leaking pinion seal and have play at the yolk. the issue just started and I am not driving it until I fix it. thank you.