I don't think I've seen malware associated with video content since the Limewire days. I think the closest I'm aware of in recent memory was some talk of malware coming out of some of the "fake" Pirate Bay proxies, but even then I'm not sure it was associated with video.
Any halfway respectable tracker public or private you should be fine.
Source: https://www.pornhub.com/view_video.php?viewkey=64554bcc3ab4b