First, maybe "bjlikiwithelliemisa" is a username or a title. It's not a standard word, so could be a username on a platform like YouTube. The numbers "180923" might be the release date in YYYYMMDD format. Here, 180923 would be September 23, 2018. Then "p0500" could refer to a part number or page, like part 5, since "p" is commonly used for part or page. The "min" at the end suggests the content is a 5-minute video.