This is very usefull app for students also..their overall performance was also good but in the recent update,there are many glitches🥺... one of them which i found difficulty in that, whenever i play videos in mobile in a full screen then there is no option for video playback speed...this option is only enables for half screen mode...i personally thought this is very time consuming now... YouTube please correct this as soon as possible..🙏🙏🥺