Looking at the swimming, nothing is standing out. I would suspect that she is female, and has started putting on eggs, though is seems either late for this year or early for next year. Spawning usually takes place, in my experience with a full moon in late April, May, or up to mid-June, but she may just be slow to come of age. It appears to be a doitsu, (scaleless) fish which makes detecting dropsy difficult. Dropsy is a case of the kidneys not being able to excrete as much water as the fish has coming into the system, which could be kidney failure, or a major breech in the skin which acts to isolate the insides from the pond. I would try to get a view of the bottom of the fish so see if there is a major ulcer. No ulcer, keep an eye on the fish, and enjoy. Ulcer, come back with pictures and we should be able to help.
If you aren't, as yet, get a good test kit, like the API Freshwater Master Test Kit and an API KH Test Kit. If there are problems, we like to start by seeing what the water parameters are as they are often the cause of problems and knowing where the pond is and where it is going chemically is very important.
Zone 7 A/B
Keep your words sweet. You never know when you may have to eat them.
Richard