The reason for having only one list of search options is due to changes in the plugin API and to enable additional options without having to worry about filtering them depending on what type of resource you're searching for (some sort orders are only available for certain resource types). The actual search behaviour should be unchanged from the previous version.

If you provide the protocol (http(s|)) when entering the URL, you should be able to retrieve the video directly, instead of relying on it appearing in the search results. The YouTube API is basically broken and appears to be Google's attempt at trolling third-party developers. Prior to switching to version 3, I was hoping they might have simply fixed the issues with version 2, but instead they have removed useful features (latest subscription videos), and made it necessary to make multiple requests in order to retrieve the same data that was previously retrieved with a single request (e.g. no duration returned in video searches).