Realistically Wan 2.2 Animate would be your best bet. You can use it as rebranded versions on sites such as Higgsfield (they call it Higgsfield Animate). You would need to cut up your video in parts, but what you would do is upload your video, add an image of what you want to replace the scene with (maybe a concert etc) of and all of a sudden you are performing at a concert.
You may have to do some post video editing work to get a solid video. Although most of these are tailored to changing the character, you can definitely play around and get a good result. This is really the best simple option unless you want to delve into ComfyUI insanity.
https://higgsfield.ai/animate
https://higgsfield.ai/app/recast
You can also try restyle through Openart
https://openart.ai/video/restyle
Other open you can have (results may vary), upload the video as a character in Sora 2 which is a brand new feature which clips a few seconds of your video to build from, and use it to build something from it with the same character (you can even add the lyrics)
There's a few tools that can get something good, just perhaps not necessarily what you are looking for.