It’s common for music you pick to not last the length of a year long video and so it restarts and loops some point towards the middle. Some music even loops multiple times.
Today there is a delay of about 5 seconds between when a song ends and when it starts again. The silence is very noticeable and awkward. I think ideally there would be zero delay and just a seamless loop. But if that’s not possible, please at least shorten it to a second or so.