This is how it'll look like when you're done:

STEP 1 - IMPORT YOUTUBE API IN AUTOWEB

• Open AutoWeb -> My Web Services
• Import the YouTube Web Service

STEP 2 - CREATE NATURAL LANGUAGE VOICE COMMAND

• Open Tasker and create a new profile with the AutoVoice Natural Language event condition
• Create a new command with a command like play some video on my pc and a response like ok playing some video on your pc
• Highlight some video and create a variable called video with the expression
• Accept the command and create a task for the profile

STEP 3 - FIND VIDEO ID

• Add a flash action showing that you're going to play %video on your PC
• Add an AutoWeb action
• Select the YouTube API and the Search action
• In the Query field write %video (which contains the video you said in the command)
• In the output fields select the Video Id field so you can get that variable in Tasker
• Add a flash action in Tasker showing the %videoid1 you found

%videoid1 is the first value in the %videoid() array, which is a list of all video ids found on youtube for the query. This way you get the first result from the search

STEP 4 - PUSH VIDEO TO PC

• Add a Join Send Push action
• Set the device to the chrome device you want to receive the video in
• Set the URL field to https://www.youtube.com/tv?v=%videoid1

https://www.youtube.com/tv?v= is a special type of URL that opens the video in TV mode. If you follow that with a video ID like we did here the video will start playing right away in full screen

• Exit Tasker to save

STEP 6 - TEST

If you now say something like play nature in 4k on my pc the video should be pushed to your PC and start playing in full screen