I’ve spent holidays alone or travelling in the past. I also enjoy watching streamers on Twitch like Will Neff who does weekly movie nights, watches entertaining YouTube videos like Roll For Sandwich, and shows like Survivor on stream. His discord community hosts a variety of events when he’s not streaming. At any given point you can usually catch his community members watching movies together in a voice call or just while chatting. My suggestion would be to find a streamer that you enjoy watching or a community that participates in events together on mediums like discord.
That or just get sucked into a really good show. Whatever works for you