Dreams about losing items, especially those with sentimental value like VHS tapes from family members, often symbolize feelings of loss or disconnect in your relationships or memories. Your aunt and uncle's tapes may represent shared experiences or family history that you feel is slipping away from you.

The act of scheming to steal the tapes back from your grandpa could suggest a desire to reclaim lost connections or memories. It might indicate that you feel pressured to maintain or restore family ties, and the anger from others in the dream could reflect your own anxieties about how your actions might affect your relationships.

Consider reflecting on your current relationships with your family. Are there unresolved issues or feelings of being misunderstood? This dream might be encouraging you to address these feelings openly rather than resorting to deceptive measures. It could also suggest a need to value and preserve your family history and the memories that come with it.