1. Thank you for your beautiful photos/videos. => 멋진[아름다운] 사진/비디오 고마워요. 2. I am looking forward to your beautiful photos/videos. => (XX 씨의) 멋진[아름다운] 사진(이)/비디오(가) 기대되네요. 3. I like your shots so much, you are so good in capturing beautiful photos. => 사진이 정말 좋아요. (XX 씨는) 멋진[아름다운] 사진들을 참 잘 찍어요.. => (XX 씨의) 사진을 정말 좋아해요. 멋진[아름다운] 영상를 잘 담아내세요. 아름다운 is closer to the original meaning of "beautiful", while 멋진 is like beautiful and fantastic combined. You can substitute the person's first name for XX if he/she is your personal acquaintance, or use some other word like 선생님의 or 작가님의 instead of "XX 씨의" (there is no common pronoun like "you" in Korean that you can use freely in any context)