Videos in several languages and animated elements

We create courses in 7 languages. In the courses we have integrated videos and text-to-speech audio files and some of the elements are also animated on the speaker text. When the videos are spoken, I get these videos in all languages (no subtitles).
I can assign the audio files to the language with the help of triggers, but how do I do this with the videos?
And the animated elements on the slides are also only aligned to one language and animated.
Do you have any tips and tricks?
Thank you