From your Vodpod home page, click the “organize your videos” link. This will bring up the organizer:
You can then use the organizer to quickly assemble a set of videos from your collection. Just shift + click to select the videos you want (or use search to refine your list first). Once you have selected the videos you want, you can then give them a specific tag (or tags), or move them into a separate collection.
Then, just setup a widget based on those tags (or, create a VodSpot module that points to those tags).