For A1 you could say fantasy-style films because they are fun to see how the movie works out after special effects and stuff. For A2 you could say Harry Potter because he is very adventurous.
For B1 you could say Netflix or something like that
B2: Daniel Radcliffe because he is a great actor especially for the role of Harry Potter
Disclaimer: this is an opinion-based question so I cannot give you an exact answer but this is the best I can give you.
