03-13-2019 11:00 AM - edited 03-13-2019 11:01 AM
Sometimes shared videos may get removed from social media platforms. In most cases, this is be due to the music being used. You'll find more information about this here: https://gopro.com/help/articles/question_answer/Quik-for-mobile-Licensing-Content-Questions
Sorry, I'm not quite sure what you meant by how you can utilize Epidemic Sound in Japanese. Are you specifically looking for music in Japanese? You can download songs / tracks on Epidemic Sounds, you just have to create an account through being logged into your GoPro account.
You should be able to select Japanese as your language when viewing gopro.com. Just click on the globe icon wtih "EN" next to it, at the top-right corner of the page, then choose your language as shown below.
The main key parts that I suggest you have to consider in order to achieve a smooth / successful playback on videos with high frame rates (e.g. 120FPS, 240FPS) are the CPU and video cards (GPU). While we do not have a list of preferred system / hardware specifications about this, here's the list of minimum system requirements for Quik for Desktop that will shed some ideas.
Hopefully this helps!