This video tutorial goes over naming alkanes with subsituents.
This video tutorial explains how to name an alkane that has a branched substituent using parenthesis rather than common names.
This video tutorial goes over the how to name a compound that has different substituents chains attached.
This video tutorial goes over how to determine which chain is the parent chain in an alkane if there is more than one longest chain.
This video tutorial goes over the cases that would lead to the alphabetically first substituent getting the numbering priority.