Addiction is the source of EVIL.
WARNING: do not watch ANY sort of "short videos"!!! They are a complete waste of your TIME=LIFE. Those who created them are fully aware of their harmful action and use phychologists (today's EVIL guys) to amplify its effect. Notice that they are "unfinished" (you need to replay them again and again multiple times before you "get the point"), they are faster than anyone can comprehend (again, to force you re-watch it as many times as possible), have no FF or RW (Fast Forward or Re-Wind) buttons, so you cannot control the time, and they are addictive the same way as a chess game is: a) if it was good --> repeat, or b) if it was bad --> repeat, thus a vicious cycle, you can never get out of the caroussel.
Rule No. 1 (watch out for Muslims, we do it for 1447 years): IF IT IS ADDICTIVE, DO NOT DO IT! So your test is plain and simple: ask yourself this simple question: is it ADDICTIVE? Id este: does it have a "positive feedback loop" built in its algoritm? Positive feedback loop means the above a)-b) IF-THEN loop. If, from a programming point of view it results in a LOOP (pointing back to itself), then label that thing (whatever it is) HARMFUL and AVOID IT immediately.
Examples of addictive stuff are legio: chess, as mentioned, or ANY kind of competitive (!) sports (where there is a winner and a loser), and the usual stuff Islam (and many other decent religions or philosophical, ideological groupings as well) prohibits: alcohol (on a chemical level), gambling (on a mental level), usury/interest (where money makes money), etc. The rule is simple: USE IT to have a better life, where you are in control, where your MOST PRECIOUS ASSET: TIME is not wasted.
Remember, life is nothing else than a finite amount of time between your birth and death. USE IT WISELY. Peace