The above steps to rotate video in VLC is only for playing current video, and if you want to rotate a video permanently, please follow the instruction below.
Save Rotated Video in VLC
Step 1. Click Tools > Preferences, then click All in the bottom left corner to show all the options. Scroll down and find Video option, and click the Filters option to show all the sub-options. Then choose Video transformation filter and click Save.
Step 2. Click Media > Convert/Save. Then click +Add to add the original video you want to rotate. Next, click Convert/Save to continue.
Save Rotated Video with VLC
Step 3. Then in the Profile edition window, click Video codec and check Video checkbox. Then, click Filters and check Video transformation filter checkbox. Next, click Save.
Step 4. Now, it’s time to save the rotated video. Just click Browser to choose the output path and click Start to save the rotated video to your computer.
In order not to affect the normal use of VLC, don’t forget to reset the VLC. Just click Tools > Preferences and click Reset Preference in the bottom to reset VLC.