[lbry] relax _VALID_URL regex(closes #27144)
[lbry] relax _VALID_URL regex(closes #27144)

ozburo/youtube-dl,yan12125/youtube-dl,yan12125/youtube-dl,Tatsh/youtube-dl,spvkgn/youtube-dl,rg3/youtube-dl,Tatsh/youtube-dl,spvkgn/youtube-dl,rg3/youtube-dl,ozburo/youtube-dl