The video tutorial explains prepositions, which provide additional information about nouns, such as direction, location, or time. It introduces various prepositions like 'to', 'on', 'in', 'for', and 'from', and provides examples of their usage in sentences. The tutorial also lists essential prepositions and demonstrates their application in different contexts, emphasizing their importance in grammar.

Explain the difference between 'above' and 'below' as prepositions.

What information do prepositions provide about nouns?