Hi Raphael,
Loved your video! All that fun and steam clean the floor at the same time! Magic! It must be a pain to be in a flat however nice it might be, like you we cannot go out unless it is for food or once a day for exercise but at least we have a garden.
I see you belong to the Paris Model Yacht club, when we visit Paris I often take a small yacht to play on the ponds of your parks. We are fortunate living only 3 km from a park with a large lake. A few years ago I did a lot of work on an old model yacht its about 90 cm long I don't know anything about its age etc. But with a piece of clear plastic attached to its rudder to make it larger and single channel radio control it sails quite well. The first time it sailed in may years if you haven't seen it before.
Take care stay safe.
Tony.