Friday is here, and it’s time CatTime.com’s weekly installment of five cat videos from YouTube. Each week, we search the video channel for content that is entertaining and moving, and all centered on cats. This week we have four videos that involve dogs, and one that involves a feline and a trampoline.

The sinking of the R.M.S. Titanic is widely regarded as one of the most tragic events of the 20th century.…