Not sure if this work on win7:
Add the following into brave://adblock (custom rules). See if this helps with the crashing. Test without using another Adblocker, with shields up on Youtube.
m.youtube.com,music.youtube.com,www.youtube.com#@#+js(trusted-rpnt, script, /^(\(function serverContract\(\))/s, '/*start*/(function(){const wrapper=(target,thisArg,args)=>{let content=Reflect.apply(target,thisArg,args);if(content.includes("ssapPrerollEnabled")){const modifiedContent=content.replace(/\n.\n.playerConfig\.ssapConfig\.ssapPrerollEnabled.{2}(?:tru|fals)e/,"");return modifiedContent;}return content;};const handler={apply:wrapper};window.atob=new Proxy(window.atob,handler);const scripts=document.querySelectorAll("script");for(let i=scripts.length-1;i>=0;i--){if(scripts[i].textContent.startsWith("/*start*/")){scripts[i].textContent=scripts[i].textContent.replace(/\/\*start\*\/(.*)\/\*end\*\//g,"");break}}}());/*end*/$1')
m.youtube.com,music.youtube.com,www.youtube.com##+js(trusted-rpnt, script, /^(\(function serverContract\(\))/s, /*start*/(function(){const wrapper=(target\,thisArg\,args)=>{let content=Reflect.apply(target\,thisArg\,args);if(content.includes("ssapPrerollEnabled")){const modifiedContent=content.replace(/\n.\n.playerConfig\.ssapConfig\.ssapPrerollEnabled.{2}(?:tru|fals)e/\,"");return modifiedContent;}return content;};const handler={apply:wrapper};window.atob=new Proxy(window.atob\,handler);const scripts=document.querySelectorAll("script");for(let i=scripts.length-1;i>=0;i--){if(scripts[i].textContent.startsWith("/*start*/")){scripts[i].textContent=scripts[i].textContent.replace(/\/\*start\*\/(.*)\/\*end\*\//g\,"");break}}}());/*end*/$1)