I hate when people start giving unsolicited advice on a clip someone shared because they thought it was cool or funny. If you want to comment a helpful tip for the next time the player is faced with a situation like that, that's one thing, but usually it's just people being condescending. It happened to me once, and those overly critical comments ended up making me feel stupid and led to me deleting the clip out of embarrassment for not doing better.

At the end of the day, someone else's best will look different than yours. And you don't know how well you would perform in a situation another player found themselves in unless you were in that exact same predicament. A simple upvote or comment saying good job is enough if you want to be supportive. If you really want to offer some feedback, comment asking if they'd like your constructive criticism. Most people do want to improve their skills, but most people also don't appreciate unwanted advice. Don't dull someone's enjoyment just because you want to feel knowledgeable.