Assalamu alaikum ustadh. Sometimes The lectures takes around 2-3 hr to complete for but it's 1 hr video (due to replaying to understand everything fully, notes..)is this recommended to do or should one move on even if they don't fully grasp, as sometimes it's the only thing done the entire day.

Ustadh AbdulAziz al-Haqqan

2 to 3 hours you have 22 to 21 hours left. You can do this no problem whatever you prefer, and you can also devide it up, so you watch the first 30 min which will take u an hour for example and u continue the next day or later on.