WIth my previous ISP, I swapped the ISP’s router with my OpenWRT’s and everything worked fine. With my current ISP, it appears that it’s not that simple to swap the router altogether. But I’ll be honest, the biggest factors are price and number of routers/switch. As I want 2.5gbps, I’d need a router with at least dual 2.5gbps ports. The WIFI6 offering is also quite nice. And if I can’t swap my ISP router, it would just add another device. In a perfect world, I’d have a single router running openwrt, with wifi6 and couple of 2.5+gbps ports (but unfortunately openwrt doesn’t play nice with most wifi6 routers and these routers can get very expensive) For now, my ISP router does the job and I haven’t had any issue (yet)
Without talking about the resources it would require, youtube could totally only serve the ad until it has been “watched”. And no amount of sponsor block or similar software would help. These software only work because youtube allow you to navigate the video. If they decide that you have to fully download a 30s ad video, and that you can’t ask for the video for the first 30s, then you wouldn’t be able to do anything (or at the very max, just hide the ad and wait 30s on a blank screen).