The sidebar says
This community is the place to discuss and ask questions about anime, anime news, and related topics
Emphasis mine. Episode discussions are created here constantly, so what’s the problem with linking a full legal episode of an anime?
The idea that if it was a trailer it would be fine is ridiculous
I’m not a mod of course, but I think posting full episode links would overshadow the bot discussion posts. We have those for a reason. At least for seasonal stuff.