Content Ingestion via Youtube does not work as expected

Steps to reproduce issue:

1) Open the simple uploader
2) Click Youtube
3) Search for clip
4) Click on clip to add to project, a "+" symbol is added to show the user that the clip has been added to project*
5) Search for another clip
6) Add clip
7) Press Next

*The clip is not added to the project, only the last clip(s) selected will be added.

Expected behavior:
Searching after you have added clips should not reset the clips added to the project. The user should not be required to click next for each addition, as many clips can be imported at the same time.