ProTube is described as 'full-featured video player for YouTube' and is an app in the Video & Movies category. There are more than 10 alternatives to ProTube for a variety of platforms, including Mac, Windows, Linux, Android and iPhone. The best alternative is NewPipe, which is both free and Open Source. Other great apps like ProTube are SkyTube (Free, Open Source), Minitube (Freemium, Open Source), Echoes Player (Free, Open Source) and Kaku (Free, Open Source).
NewPipe is a lightweight YouTube front-end for Android. It doesn't need the YouTube-API or any Google Play Services, as NewPipe only parses the YouTube website in order to gain the information it needs.
SkyTube is an alternative, free, open-source YouTube application for Android. It allows you to use YouTube comfortably without the need for Google/YouTube account and hence this app only offers read-only access to YouTube. VIDEO BLOCKER
Minitube is a YouTube desktop application. With it you can watch YouTube videos in a new way: you type a keyword, Minitube gives you an endless video stream. Minitube does not require the Flash Player.
Echoes is a YouTube media player that provides a great, simplified user experience with no trailer ads or other distractions like comments. Simply select a video to play it and add it to a live playlist with an easy option to go full screen.
Kaku is the next generation music player that supports many different platform like YouTube, Vimeo ... etc. With it, you can listen to any music you like in different platform with just one single click, so simple to use !
Yourtube adds a fully integrated downloader to the YouTube app of your jailbroken iPhone or iPod Touch, so you can keep those great videos that you love to watch. Yourtube is available in Cydia (jailbroken devices only).
myTube is a YouTube app built to keep your video playing no matter what. By lightly fading the video into the background, you can continue to watch while you read comments, browse channels and videos, and everything else you can do in the app.