service file
import { Observable } from \'rxjs/Rx\'; import { Http,Response} from \'@angular/http\'; import { Injectable } from \'@angular/core\'; import \'
You are not calling the getVideos method. You are calling subscribe on the function reference of getVideos and not the returned value. Call subscribe after you call getVideos():
getVideos
subscribe
getVideos()
ngOnInit() { this.videoserv.getvideos().subscribe((response) => { this.videos = response }); }