Hi,
Not a video but here is a compilation image, taken from the service manual on how to change the oil and the oil filter in a 1997-2000 Honda CR-V
[image|2078669]
(click on image to enlarge for better viewing)
Here’s an image that shows the electrical wiring for the reversing lights which may help.
[image|2078672]
(click on image to enlarge for better viewing)
Get the OBDII port scanned for any codes to find out what is wrong if anything with the engine.
Any engine degreaser should help to clean up the outside of the engine.