Under a lot of teasers on distributor channels you will see three short lines: an Artist line, a Title line and a Release line. It helps to know this is a standard template. The distributor fills it in for every teaser it posts, so when several teasers go up within the same minute they look almost identical. That sameness is not a sign that the videos are connected, and it is not a sign that anything is wrong. It is simply one form being filled out again and again, with only the names and the date changing from one post to the next.
Now the lines themselves. The Artist line names the act, and for a member it can include a group name in parentheses, so read the parentheses as the group the person belongs to. The Title line may show the song title in two languages, which is just the same title written twice, not two different songs. The Release line gives a date, written as year, month and day. That date is the release date of the song, not the day the teaser was uploaded, and it usually comes with no time of day, so please do not assume one.
If you are following several teasers at once, sort them by the Release line, not by the order they were uploaded. Upload order only tells you which post the distributor happened to publish first, while the Release line tells you which song is meant to come out first. Two teasers posted in a row can point to dates far apart, and a later upload can point to an earlier date. Reading the date line first keeps your own list in the right order and stops you from mixing up which song belongs to which day.
Be honest about what the block cannot tell you. It does not give a time, it does not say whether the release is a single or an album, and it does not list credits. Templates also differ between distributors, so a layout you learned on one channel may be arranged differently on another. The full video often follows on or near the release date on the same channel, but the block does not promise that. If you want a time, a format or more detail, the act's own channel or its notices may add them later, and that is where we would look.