It's not unusual for a bear to break into a home in the West. Most of the time they're looking for food. In this case, a video shows a bear trying to express himself musically as he played a piano - sort of.
Many people go to the lake to relax. One other possibility you need to consider if you live in our part of America is that you also might be sharing that lake experience with a whole bunch of moose as one family was surprised to learn.
If you have a security camera anywhere in the western United States, there's at least a chance you'll see a bear on it at some point. One Colorado family learned that a nearby bear really liked their camera a lot.