function generateVideoFilename (videoOrPlaylist: MVideo | MStreamingPlaylistVideo, isHls: boolean, resolution: number, extname: string) {
const video = extractVideo(videoOrPlaylist)
function generateVideoFilename (videoOrPlaylist: MVideo | MStreamingPlaylistVideo, isHls: boolean, resolution: number, extname: string) {
const video = extractVideo(videoOrPlaylist)