All Collectibles in order as they appear. The characters used are just examples. Of course, you can use whatever character you like with the according abilities ;-) :
Shoot 3 yellow enemy planes.
Fly through the balloons.
There is a Minikit in a ring of studs. Fly through it.
Part B -- Video Time 00:30
Character: Ultron Sentry Officer -- Video Time 00:30
Blow up the golden bell.
Fly up in the air.
Use Squirrel Girl at the dig site.
Blow up the black lego brick pile with Ultron.
Use Hulk on the green handles.
Character: Thanos -- Video Time 01:26
Right next to the golden cogwheels you need to blow up for the strory, there is a grapple for Hawkeye.