You can delete any video you've created directly from Samsa.
You'll find the delete button (trash icon) in several places:
Gallery — hover over any video to see the delete button
Video viewer — in the action bar when viewing a video
Favorites — hover over a favorited video
Edit history — hover over any version in the timeline
When you click delete, a confirmation dialog asks you to confirm. This helps prevent accidental deletions.
If you'd rather skip this step, check the Don't ask me again box.
The video is permanently removed — this can't be undone
It disappears from your gallery, favorites, and any projects it was in
Other versions of the video are not affected — only the specific video you delete is removed
You can only delete videos that you created yourself
In a team organization, you won't see delete buttons on videos from other members