Video there for me but too small. Copied the url then opened in full screen on YouTube. Still hard to see (fuzzy) but I think you could have avoided the video if you posted the error message. Going forward, always provide the error message and number if you know that as well.
I think your problem is that you don't have the full reference to the checkbox and Access doesn't know where Check545 is. You're using an embedded macro (most of us here avoid macros entirely) and when editing it, you need to use the expression builder to construct the full reference to the check box. It would be something like Forms!frmNameOfForm.Check545.
For everyone's benefit, the partial error statement is "the object doesn't contain the automation object..."
I'm not 100% sure if that's the reason for the error, but it certainly seems so.
The more we hear silence, the more we begin to think about our value in this universe.
Paraphrase of Professor Brian Cox.