Time formats that can be used.
HH:mm:ss (e. g. 12h 10m 30s)
HH:mm (e.g. 20h 30m)
mm:ss (e.g. 12 30m)
m:ss (e.g. 6m 0m)
HH (e.g. 8h)
MM (e.g. 12m)
ss (e.g. 45s)