There are provided methods and devices for media processing, comprising: providing at least one media asset source selected from a media asset sources library, the at least one media asset source comprising at least one source video, via a network or client device; receiving via the network or the client device a media recording comprising a client video recorded by a user of the client device; parsing the client video and the source video, respectively, to a plurality of client video frames and a plurality of source video frames; identifying at least one face in at least one frame of the plurality of source video frames and at least another face in at least one frame of the plurality of client video frames by face detection; superposing one or more markers on the identified at least one face of the plurality of source video frames; processing said client video frames to fit the size or shape of said source video frames by using said one or more markers; concatenating said processed client video frames with said source video frames, wherein said concatenation comprises matching the frame rate and resolution of the processed client video frames to the frame rate and resolution of the plurality of client video frames to yield a mixed media asset.