Because that's how YouTube finances its web-site. People & companies pay Youtube to advertise on their web-pages, because they know it's a popular site, with lots of visitors. This has the potential to generate lots of new business.
If web-sites didn't carry adverts - we'd all be paying a LOT more to access the internet !
Its obvious: if ads play and you click or buy, the advertiser makes money... same thing for any other ad.
Upgrading to YouTube red depends on you if you like ads I think you shouldn't upgrade because YouTube red remove ads YouTube red does more but if you upgrade to YouTube red it cost money but if you don't upgrade you'll have Free YouTube and me myself I don't use YouTube red because I do not want to pay and when you don't upgrade you will sometimes get ads for YouTube red
You can place ads on YouTube referring to your website. So yes you can!
you don't put the ads on , they just appear whilst being viewed
I'm sorry, but I don't believe there is a way. YouTube pays for its website and other things by advertising. You would not be able to view all of the "free" content that you do if not for the ads.
If you mean the ones in the videos, I don't think you can. Those are being put in there by the owner of the video.
Yes, YouTube video previews are safe. Adsense and Google are aware of this and don’t penalize sites for using them. If the preview links to a site that isn’t safe, the search engine will definitely penalize the site for that.
On ebay, and tv commercials on Youtube.
Youtube
To host videos and to make money through ads.
Youtube can be accessed by downloading the free Youtube app from the PSVita's PSN store.
If your YouTube video will not appear, you may need to clear your cookies and cache.