In recent past there has been plenty of restriction implemented by youtube to prevent downloading 1080p & special category 480p videos. Those are used broadcast in DASH algorithm by means of part by part broadcast audio & video separately. Those days I found some solution to regroup such part of broadcasts together by using youtibe-dl & rtmpdump but the process seems to be little complicated for general users. Now, the easiest solution is available in the market as follows:
The Firefox got an enhanced addon of “Complete Youtube Saver” - http://www.completeyoutubesaver.com/. You need also need to download latest version of FFmpeg which is available at their site http://www.completeyoutubesaver.com/...mpeg-setup.exe
Once you install the addon in firefox you need to open the option of the Complete Youtube Saver and specify the path of the newly installed FFmpeg. Now, you are ready for downloading dash encoded videos. Just open the youtube page select any video that has a 1080p version and on clicking the icon of the “Complete Youtube Saver” you will get the 1080p and all other versions available for download.
Tested the addon and it is working just perfectly. So enjoy your unlimited wish.