Ukrainian state media did publish that Snake island defenders may be alive soon after Russian claims.

I think it is fair to hold media to high standards, but shouldn't we cut them just a little slack if their country is literally being invaded right now?

For the record, I personally know I can trust that last part because I have friends and relatives living in the east of Ukraine (none of whom are particularly politically biased either way, they have kids and want the attacks to end). I cannot report any wild rampage and killing of innocent civilians, but I can definitely confirm the invasion, the soldiers and military equipment, the inability to leave the city, blown up bridges and train tracks, people hiding in basements for days, explosions, etc.

this is why you do cross-check, and need to understand the limits on the precision of realtime war info. A lot of info has significant fuzziness and consumption of it is an active process. For the snake island there was information that communication got lost at some point during the battle, and they stated that most probably all the guys died. It wasn't intentional disinformation, and that is the key difference from Russian TV. For the ghost of Kiev - the planes got shot down, while who shot down - was it the same guy or not - is very hard to find out until military gives you that, and i wouldn't hold it against the TV people who built this legend without waiting for full confirmation or denial - again you need to understand there they can get carried away and why.

For contrast, to illustrate what disinformation is - Russian TV continue to claim non-attacking of civilians while you can easily find huge number of videos (which you can easily cross-check/geolocate/etc.) of civilian targets being attacked.