Vidmate is a free apllication for downloading video and audio from literally any platform in the world which can be transferred from one storage device to another and seen in the gallary.
Althogh it is an unreleased app which is unavailable in the play store it can be trusted.It can be downloaded from their website only and it is a very small sized app also.It has tons and tons of features loaded into it.
I found it very useful for downloading youtube videos in my day to day life.
The feature which I like most about vidmate is that it provides the users a feature to hide their personal files in a very secure vault locked sith users own 4 pin password.It can be used to download almost any file from apps, videos, somgs to pdf files etc.It is very useful and I recommend this to everyone.It can be trusted blindly.