PIP (picture in picture) means two video clips share the display screen at the same time. Then you can see one smaller image superimpose on another large video frame.
It's actually not that hard to manually put subtitles into your videos. If you are having the issue and want to add SRT subtitles to movies or videos, find your answer here.
If you've ever recorded a video on your smartphone, only to find it sideways or upside down, then you can rotate it.