change Text/DataFormat of Slider's ThumbTooltip

change Text/DataFormat of Slider's ThumbTooltip

I have a slider with maximum value of video's time in seconds (1 minute =
60 seconds, so if the video is 60 seconds length, the maximum value of the
slider will be 60).
When I drag the Thumb, there's ThumbTooltip that shows the current value I
am hovering.
I want to change that text so instead of displaying int, it will display
time 1 will be 00:01 and so on...
I tried to play with the style of the Slider with no luck.
Will appreciate your help.