I am using a Chromecast right now from my laptop - reading the RV forum in one Chrome window and broadcast a YouTube video in another Chrome window. Works reasonably well (occasional timeouts) which you'd not really notice if you were casting presentations but you pick up a dropout on a live video.
I was going to use ChromeCast in our RV but decided just to use an HDMI cable instead. I got this 25' HDMI cable from
Amazon Link for $14. It has been working great for me. And.. about 1/10th the cost of the cables at my local big-box store.