Maybe it depends on what you watch. I use Youtube for music (only things that I search for) and sometimes live streams of an owl nest or something like that.
If I stick to that, the recommendations are sort of OK. Usually stuff I watched before. Little to no clickbait or random topics.
I clicked on one reaction video to a song I listened to just to see what would happen. The recommendations turned into like 90% reaction videos, plus a bunch of topics I’ve never shown any interest in. U.S. politics, the death penalty in Japan, gaming, Brexit, some Christian hymns, and brand new videos on random topics.
Live music does it for me. It’s best when I’m close enough to make eye contact with the musicians, and when the audience is into it too. It’s a total rush. If I had to pick between music and sex, it’d be music, hands down.
I can relate to the comment about swimming too. I imagine hiking, kayaking, or anything else physical that you really like could give you a similar feeling.