Tested the CastBuddy extension from the Chrome Web Store: nice, but high CPU usage even when no videos
Posted by jpluimers on 2017/04/21
This extension finds videos on the web sites you are browsing and allows you to play them on your Chromecast device.
Works nice if you need it, but uses a lot of CPU (on my Retina MacBook with latest chrome: about 75% of one CPU core) so it drains battery fast.
You can view this high CPU usage in the Chrome Task Manager (which used to be available through chrome://tasks, but this is one of the use full Find Hidden Features On Chrome’s Internal Chrome:// Pages features they removed). Fire up the Chrome Task Manager through the Window menu.
Verdict
Enable only when you need it. Disable after use in chrome://extensions
–jeroen
via: CastBuddy – Chrome Web Store:
When it finds Chromecast comptible videos ( .webm, .mp4, .mkv etc), count of videos is shown over extension’s menubar icon, which you can click to Select a video and extension will send it to your Chromecast device. Once a casting session is established, you can control video playback from Extension’s popup page.
The Wiert Corner - irregular stream of stuff 
castbuddy said
o ruim é ela ser unica, a probabilidade de torna-se paga é enorme apesar de ser vinculada excursivamente ao chromecast e inútil a qualquer outra função.
jpluimers said
Not sure if Google translate is OK, but it shows “the bad is that it is unique, the probability of becoming paid is huge despite being linked to the chromecast and useless to any other function.”.
Sorry if you are the CastBuddy developer and having a hard time, but this CPU usage is way too high.