I consider myself capable with repairs, but I am hoping someone can give me an idea where to start in diagnosing the problem.

This unfortunately began today. The washer still appears to function normally -- it was able to spin out the clothes inside to mostly dry -- but I am concerned this is the beginning of the end of whatever part or parts are failing.

A video is worth more than a thousand words:

https://drive.google.com...lz9xUm4/view?usp=sharing

The noise starts in earnest around 35 seconds and continues through the end of the video, coinciding with the speed of the drum. Note that the drum has clothes. When the drum is empty, there is no noise, but it seems that it is imbalanced because it shimmies a little bit more than I can recall at lower RPMs when getting up to the highest spin speeds.

Thanks in advance.