YouTube Feed is a Google Chrome extension that will notify you when new videos are added to your YouTube Homepage Feed.
You will be notified YouTube channels, that you are subscribed to, upload, like or favorite videos. The extensions polls YouTube every 5 minutes though you can choose a longer polling duration.
You can also right-click the extension icon in the toolbar and filter out notifications that you would not like to be included in your YouTube feed. For instance, you may disable notifications when your YouTube subscriptions, or friends, comment on a video.
YouTube Feed is open-source and developed by Google.