At A2 to achieve a Level 4 you need to ensure that your research is clearly focused and directly informs your concept development. Here is an example of a post from Rosie C in group 6 that does just this. She wanted to come up with ideas to ensure that a sequence shot in a car looks effective. She carried out some technical research on similar sequences in other videos and could draw some direct inspiration for the group's concept.
Remember, at A2 be reflective, link your research to your concept, even if it only served to discount an idea.