That's not really possible in Premiere Elements.
You may be able to accomplish this with a Track Matte -- but only if all of the areas you want to mask remain in the area of your video frame. If each area is moving around independent of the others, that could be tough to accomplish without very complicated Garbage Matte animations and several layers of video.
I have multiple clips that I need to blur a moving object completely through.
The first large clip was perfect. I went to the second clip and it freaked out the clip.
What am I doing wrong?
What can I do to fix this?
Element 15 video
Hard to say.
You are responding to a three year old thread. Virtually none of the people in this thread are still on this forum.
Why not start a new discussion?
Also, can you be more specific about what's going on? "freaked out the clip" doesn't give us much to work with.