How to fix video shot vertically on a smartphone? I recently committed the crime of shooting video vertically, and now when played anywhere except on my phone the video renders sideways. What is the best method to rotate it (using PC software), without losing any pixels?
VLC Media player, which is free, allows under it's Tools -> Effects and Filters a Geometry Tab, which you could try for rotation. 

Then you could use the Encode/Stream option under File - to try to get a decent output. 

However, unless your camera has some sort of ccd/cmos rotation feature, if the video was shot vertically, you shot it using only a fraction of the sensor, discarding the vertical space on the top and bottom to create a letter box version at a lower resolution. 

You can up-res it, either simply, or with an expensive plugin, but it's never going to be "full resolution" because the information simply isn't there.