Indirect Method
I named the scene as Video_1_comp
Go to VSE (Video Sequence Editor) and add movie
Select Only Video Strip in VSE and Strip Menu > Set Render Size
Go to the End of the Video Clip hover cursor on Timeline and press E to set End Frame
Result of all above steps
Resolution, Frame Range, Frame Rate are set to the Source Video's settings
NOW DELETE THE VIDEO and AUDIO tracks
Go to Compositing Screen
Add > Input > MovieClip
Add Rotate node and input Value -90 it could be 90 for some videos
Don't use Back Drop preview it is not correct even though output render is correct
Then create a new scene with Copy Settings i named it as Edit
Then go to Video Sequence editor Screen
Add > Scene... > choose the Scene in my case Video_1_comp
Set Render Resolution resolution to vertical frame Height Y:1280 px Width X:720 px
Go to 3D view Properties if its not showing already press n
Scroll down to find OpenGL Preview and un-check it
Now add the Same Movie clip source again on top of existing strip
But this time Mute/delete the Video strip and keep the audio
Now you can edit it like any movie clip you would have edited