I use MPV only to play HDR10+ content, which VLC (stable) does not yet support. v4 does, but that’s still nightly.
As for “seamless seeking”, I don’t think I’ve ever noticed either of them being slower by comparison. Plus, what kind of content are you watching where you need to constantly seek around so much?
E: oh I didn’t realize this was linuxmemes. I’m mostly on Windows, so maybe it depends on that as well.
Your entire post is just links written up by other people. When asked a question, you replied with a quote from someone else.
Do you not have your own words to use? It’s hard to take you seriously if you just pass it off to others each time. Be your own person bud.