I vote for sharing the video. I can't even imagine the time, effort and tears that you put into this and for them to be unappreciative and angry is unacceptable. You know you did the right thing in your heart and that's all that matters. Could some of this emotion be related to grief (theirs and yours). I think you should show it for two reasons (1) it may be cathartic to them and they may need that (2) to show them what a lovely, quality video you put together (I know it's kind of I told you so but they asked for it).

Best wishes and I hope it all works out. I'm sorry about the loss of your mom. Hugs coming your way.