There are a number of ways in which Google is looking to improve how Android device owners engage with Google/Android-related content. Of course, Google Search takes most of the work away and offers a direct means of finding apps, games (and just about anything) that you might be looking for. However, it seems Google is looking to make the streamlining of such information even quicker and easier going forward.
Earlier today, Google announced that in the next couple of weeks they will launch a feature which allows Android device owners to search for an Android game through Search (on a mobile browser) and then demo the game without having to download the game. Demos will last about ten minutes and could be a great way to increase the number of downloads a game receives. Following on from that news, it is now starting to emerge that Google might also be testing a way for Android device owners to find YouTube clips even easier and quicker through the YouTube app. While finding a YouTube video is not that difficult to begin with, it now looks as though Google is testing YouTube cards which appear when searching through the YouTube app. So if you type a specific phrase, as well as the list of videos being shown, Cards also appear at the top of the page and could provide a quicker way to find exactly what you are looking for. An example of this is shown in the images above and below. Searching for "Fire TV Stick" on this occasion brings up cards like "hack", "how to set up" and "voice remote". Clicking on any of these cards then brings up videos only related to those specific search terms. It does seem likely that the Cards are also user-specific and draw on your previous search history.
That said, at the moment it is not clear as to how widespread the feature is. It was originally being reported that it could be in an A/B testing form and as such, only certain users will see the cards available to them. Although, it does seem widespread enough right now to be appearing on a number of devices for us. So it could be the case that this is a feature which is now in the process of rolling out. You can check for yourself by searching for something in the YouTube app, although keep in mind, not every phrase/term is generating the cards at the moment.