Only thing I know is copying the link when you click share...this is how it looks when a YouTube video is copied and posted tk FB...
https://l.facebook.com/l.php?u=https://www.youtube.com/watch?v=UlxGGtVgZRE&h=ATPmPjgimclk2t_aSAzqwPNKW7XVcxp_UMCBfxdZ6feT6L7zWN3_ALzpKlkA8JEeX-RPO07C7zl-XvDlQDEIgRzLb33b084gDhJXW7qm5cTdvk_igIe6sVXbHw7C2mEt-pQ&s=1&enc=AZPFtdKYGf6sVNK24g_juH71BhUL0q1LRVsn1EoHFUUxHP2e_s98C0NryPcGuDAEvW0OZyL4KMEn9mKmrI314K8-