Yes, I know that video- I share it with everyone I see who has a Betta splendens in a lidless tank. They usually say something like "mine's too mellow for jumping" or "they only want to jump if the water quality is bad", and the video above is my response.
However, I have a lid on the tank from which the Imbellis jumped, and it's a fairly tight one (obviously not tight enough!). With my Splendens tanks, I use lids and also keep the water level lowered. And I will not be keeping any kind of Betta species in future in the tank from which my Imbellis leapt to their deaths.
However, I have a lid on the tank from which the Imbellis jumped, and it's a fairly tight one (obviously not tight enough!). With my Splendens tanks, I use lids and also keep the water level lowered. And I will not be keeping any kind of Betta species in future in the tank from which my Imbellis leapt to their deaths.