Can you download and share instagram videos to LinkedIn, when it has copyright/trending audio?

Sorry if that doesn't make sense, but client wants the videos posted to LinkedIn. If we download what was posted on instagram, which has the audio and also credits the artist, can we then post it to LinkedIn? If not, what are recommendations to add audio to video for LinkedIn? People have said capcut or canva, but some of the stuff there is also copyright music or not royalty free.