Answer: Not really.
Step-by-step explanation: if this behavior was caused by videogames, it should have been evident before this happened. Also, videogames have this bad reputation, but in reality, there are a lot of studies that say that videogames don't really influence their behavior that much, compare with other factors.
The nurse needs to explain to the parents that this curiosity is completely normal. The child just experienced the loss of a sibling, which can be a traumatic event, and in the future, this kid could develop "survivor guilt", which is very common in these cases. It is okay to be curious, especially when you are 8 years old, and this can be a way of dealing and coping with the whole situation.