If you want to visit any page from your PeerTube instance of choice in SimpleerTube, just prepend https://simpleertube.metalune.xyz to the URL. So, https://videos.lukesmith.xyz/accounts/luke becomes https://simpleertube.metalune.xyz/videos.lukesmith.xyz/accounts/luke.
A free software to take back control of your videos
Peertube is an open, federated alternative to Youtube without advertising or tracking. On this site, you can find a good Peertube instance, with good rules, good moderation and most importantly a friendly community.