Add spaces: Inotherwords,they'resittingbackandlettingYouTubespinupthenextvideotobewatched.

Answer: In other words, they're sitting back and letting YouTube spin up the next video to be watched.

Add spaces: Protectionrating:IP66(electronicthumb-turn),notavailableincombinationwith.TSor.MR.WP

Answer: Protection rating: IP 66 (electronic thumb-turn), not available in combination with .TS or .MR .WP

Add spaces: Ofcourse,peoplediffergreatlyintheirreactiontosunlight.

Answer:
Of course, people differ greatly in their reaction to sunlight.