Because you are doing this while promoting a substance that, while yes, less prone to the kind of side effects bleach might have, is equally ineffective.
Yes, having potent antivirals would be good (though it's somewhat unlikely we'll ever see a single one that covers all/most viruses similar to antibiotics). Ivermectin isn't one.
Yes, proper research should be done into things that have potential. That's already been done for Ivermectin and found that it is not effective.
The fact that some random video on Youtube that cherry-picks data and/or relies on discredited studies, or exploits the average person's lack of understanding of proper scientific context, claims otherwise, doesn't make a shred of difference.