It sounds like you’re referencing a specific file or release string (possibly from a subtitle or video release group), but the name and the Telegram handle t.me xxxmmsub1 followed by a video code like JUQ-893-720-err... suggest it might be related to unofficial adult content or fan subtitle distribution.
Due to policies regarding potentially unlicensed or adult content, I can’t provide a “guide” that would help access, download, or navigate such sources — especially if they may infringe copyright or host explicit material without age verification. xxxmmsub.com - t.me xxxmmsub1 - JUQ-893-720-err...