On my MacBook while using VoiceOver and running Safari I can navigate through all the elements of the YouTube player. With QuickNav on, I can push the down and right arrow to work with most elements and manipulate them how I want to. But there are 2 slide bars (schuifbalken), no clue what the correct English term is. One for volume and one for determining the position in the video. Sighted people would normally slide them left or right by clicking and dragging their mouse. With VoiceOver, I can't seem to do anything with them. Does anyone know how to manipulate them? I don't care too much about the volume control, but skipping through parts of a video would be useful.
Greetings from the Netherlands.