Some videos improve when played in sync with other video/s (for example coop let's plays). For such reasons websites like https://viewsync.net/ exist. Such a functionality in myTube would a awesome thing IMO.
Concept:
User plays a video.
User browses for another video to add
User rightclicks and selects something along the lines of "Watch in sync with current video"
Viewport gets split by a specific pattern [open for discussion].
Some controls are merged (scrubber, play/pause, speed)
Some controls are split into each video "frame" (volume, captions, video offset[seconds], button to use selected frame as audio source)
Some videos improve when played in sync with other video/s (for example coop let's plays). For such reasons websites like https://viewsync.net/ exist. Such a functionality in myTube would a awesome thing IMO.
Concept: