Here are some videos on how to perform hydrotherapy. These simple practices that are generally available for anyone to do. But be aware that for certain methods, there are certain conditions for which that method should not be performed.
Note that the information shared here is for informational purposes and not as a substitute for professional medical advice. You should consult your qualified healthcare professional for advice in your situation.
This video provides general but more detailed information that you should know about various treatments.
COVID-19 Treatment from Gulf States Conference on Vimeo.
These videos demonstrate these methods for you: