Are the INE practice labs structured to follow the Videos ? Meaning, finish one topic and then
pop over to labs and practice what you learned ?
It depends on which Workbook you're doing. If you see a task within a Workbook that has a generic title like, "BGP Task-1" or "Full Scale Lab 1" then generally those tasks are meant to be done after you've completed watching an entire course because the tasks require knowledge of several technologies to complete.
However, if a task has a specific name such as, "OSPF Virtual-Links" then that type of task could be worked on immediately after viewing one-or-more videos on that topic.
Hope that helped!