This instructable shows you how to rotate a video online using Kapwing, an online video editing suite
Step 1: Go to Kapwing's Rotate Video Tool
Navigate to Kapwing.com and open the rotate video tool. Then, upload your video or paste a link to your video if it's already on YouTube, Vimeo, etc.
Step 2: Rotate
Choose your rotation and flip settings in Kapwing's editor. Flip right or left or across the horizontal axis.
Step 3: Download and Publish
Download your flipped MP4 to download across platforms, like IGTV and YouTube.