We have seen how to convert YouTube into a music player by using the chrome extension Upnext. PlayTube is yet another chrome extension to accomplish this task.
Best Chrome Extensions - PlayTube
This Chrome extension might not be as intuitive and feature rich as Upnext but it scores a bit more over its counterpart in some sense as it can be downloaded directly from the chrome store where as Upnext cannot be.
To add a Youtube video to PlayTube just click on the "+Save" button of the video showing up in the seach results. This video will be added to the "Saved" list of PlayTube. We can create playlists from the videos that we have in the "Saved" list. In other words to create a playlist we'll have to first add videos to the "Saved" list and then transfer them to the playlist section. Some users find it very cumbersome and this is one of the reasons why many users prefer other similar chrome extensions over PlayTube.
There are some public Playlists though which are pre-curated and contain songs that are most popular currently. This extension is definitely a worth a try and if you do not mind the process of creating playlists in PlayTube then definitely this chrome extension will smoothly do what it's meant for.