Not using a slider, no. I could change the entire scale to hours though.
Edit: I also just realized I could remove the small text input to the left of the slider, add my own text that reads the slider minute input and translates it into HH:MM. I will play with this option and get back to you. I also could use a select input but that might be too limiting.
Edit 2: The reason I am using slider’s and other unique inputs is because on the iPhone typing HH:MM is annoying. Even on the desktop its a bit cumbersome compared to just sliding something over. I agree it is hard to quickly interpret what 240 minutes is however I do think minutes scale provided more flexibility in the long run as do the slider inputs.