Feeling frustrated; couldn't complete the workout

Today was my HIIT day and I did this workout: https://www.fitnessblender.com/videos/fat-burning-hiit-cardio-workout-with-no-equipment

I had to stop 2/3 of the way through though, I just couldn't do it. My university room feels like an oven at the moment because it's hot outside, I have no air conditioning or fan, and I can't get much air into my room because I have a safety restriction on the window.

Anyway, I'm still frustrated I couldn't get to the end because I really want to get better at my cardio. Hopefully I can give it another go another time.