Yeah, what he said...
Nat sound packs are always tricky, and something like that doesn't provide a lot of opportunities. Leaves rustling as the berries are picked, berries being dropped in the basket, and...umm...
At least in my opinion, silence is our arch-nemesis. This is true for a typical package with a track, and doubly true for a nat sound package. With a reporter track, it's broken apart with bites. With what you did, it has to be broken apart with nat pops or bites from someone else. The pacing of the editing has to be spot-on...half a second of dead space brings the momentum to a halt.
I did like what you got out of the guy, and I probably would have started with him. I don't know who he was, but if he owned the farm, maybe some bites about the farm itself or strawberries in general would have helped. Something slightly more informational from him, broken apart with some goofy stuff from the mom and kids might have made it flow a little better. I also would have closed with that shot of them walking out of frame, or the one you used...not both. It was like the story ended twice.
All that being said, you did have some nice shots in there, and I hope no one is discouraging you. I'm far from being perfect myself; looking back at something I did a year or six months ago makes me cringe in some places.
As for the company frowning on youtube, have you asked them about posting videos just on here? I don't see how they could object, if you tell them you're doing so to get feedback from other photographers. They should encourage you for taking initiative to improve like that. Anyway, keep it up!