You can't use a passive cable to convert svideo to HDMI. An active converter would work.
Your TV may have a shared component-composite video input. Check the TV manual. You would change the input to composite in the TV menu and connect the composite video out of the LD player to one of the component input jacks.
converts composite to hdmi and upscales up to 4k at 60fps. Most laserdisc look better then dvd with the upscaling, motion is better and colors are warmer. Best settings for movies is to use natural picture setting with deep blacks and for animation such a Disney use movie picture setting with high contrast and warm colors. I hope this helps.