We have seen an increase in modified apps offering tweaked capabilities such as Snapchat++ and YouTube++ however we have also seen an increase in these companies putting blocks in place, currently Snapchat are banning users and YouTube are also causing problems. 

More and more user are reporting problems with YouTube++ with videos either downloading with no sound or the app crashing when trying to download a video, thankfully there is an alternative that is still in he AppStore after a few weeks. 

Jungle allows users to download a video simply by letting it play for a few seconds. Users can download the app straight from the AppStore here