Social Media Lower Third Parallelogram by Flatmotion on CGguy
https://elements.envato.com/social-media-lower-third-parallelogram-A4FPSLW
Free 
3D Social Media Lower Thirds by Flatmotion on CGguy
https://elements.envato.com/3d-social-media-lower-thirds-2RSZ9M5
Free 
Clean Youtube Subscribe by Flatmotion on CGguy
https://elements.envato.com/clean-youtube-subscribe-4QXE7ZW
Free 
Modern Social Media Lower Thirds by Flatmotion on CGguy
https://elements.envato.com/modern-social-media-lower-thirds-SNXBZLN
Free