Sorry to hear you're having trouble watching the lectures!
We would recommend trying the following steps in order to try to troubleshoot this for you:
Step 1: Try enabling cookies and disabling any ad blockers! Depending on the internet browser you are using, you can find all the information on how to do this HERE.
Step 2: If you are still unable to load the lecture, we recommend trying on a different internet browser (we recommend Google Chrome or Firefox).
Step 3: In order to rule out any issues with your device, we recommend trying to watch the lecture on another device.
Step 4: If the lecture is still unable to load, this may be due to the internet speed, therefore, we recommend running a Speed Test to see if this might be causing your issue.
If you continue to have issues after following all the steps mentioned above, please comment on the 'Student Support and Queries Thread', that you can find at the top of your Student Support Group.