Does this house martin need help?

Hi everyone,

Following up my last post about this same nest, I've noticed a bird unable to fly stuck on the windowsill outside. I'm not entirely sure if this is a juvenile or an adult, since from what i can find theres not really a distinct difference. I know me recording is probably stressful enough for the poor thing, but I'm worried for it, especially because the birds are red listed

https://youtube.com/shorts/0LWXVcBXBsc?si=7WNxpvI-pcZ0APm6

Thank you