This length system has 3 issues:
- what if your video is 5:01 with 5 seconds of intro. It can mean you fall under both tags, which can imply quite a diffirence. This tag should be automated on that and rely on some other input.
- what about threads which involve the same video but in a short/long version (long having some animations looped). Due to tag limits it would be anoying if these need 2 or 3 tags while other videos only need 1
- If not mandatory its often useless as a lot of videos will not end up having such tag