The sound in your video
On Mini, Fast and 2.0 the band performs to a clip of the trend's sound; Seedance 2.5 plays an original groove. The song itself belongs to its rights holders, and the apps' music libraries license it for posts on their platforms, so the safest way to post is to use the sound from the app's library.
Adding the trend sound
On TikTok or Instagram, add the sound from the music library, turn the video's own audio down, and slide the song so its big high note lands on the lead's close-up between about 7 and 13 seconds. The sax solo starts at 13 seconds.
Captions that work
The meme's captions are deadpan: "My fantasy league's All-Loss Desk Concert", "The office band nobody asked for", "Week 8 support group". The video has no text on it, so add your caption in the app and tag the friend on sax.
Label it and keep it kind
Mark the post as AI-generated where the app offers it. Don't present it as real footage, and don't use it for ads or endorsements.