Summarize this content to 100 words [matched_content] source 水下 飞碟 最好的 TOP 10 underwater UFO (USO) videos 35973 , 2018-04-01 23:29:32 , 00:04:46 UCE97bOxyt9JCGV2aLN957iw 298 ufo,uso,underwater,unidentified,submerged,alien,disc,extraterrestrials,ovni,sea,boat,ship,ball,object,paranormal,strange,catched,unique,compilation,top,10,best,real,filmed,surface,ocean,lake,river,true,proof,existance,ebe,水下,最好的,飞碟
