Yes I have done this uninstall driver for the audio (Realtek) and it corrects the problem for a while. Usually good for a few weeks. When it stops I go through the steps again. Here is what I do.
What I did to correct the problem was to go to the device drivers and uninstall the Realtek I2S Audio Codec driver. You can do this by going to the Device manager (typing this in the Windows search will get you there). In the Device Manager window near the
bottom of the list expand the "Sound, video and game controllers" line. This will reveal the Realtek I2S Codec driver.
-- Right click on the Realtek I2S Codec line to bring up the options menu. Select "Properties". This will open up a new window with the driver information. The Device Status box will likely say the driver is working properly. Ignore this.
-- Then select the tab "Driver". There you will see the driver date and version. Mine is 2/13/2015 and version 6.2.9600.527.
-- If you have an older driver you can update it with the update button.
-- If you have the current driver, select the "Uninstall".
-- DO NOT check the "Delete the driver software for this device". We want to use it when we reboot.
-- Then click OK
-- Then OK the driver information window.
-- Now restart your Surface 3. This will reinstall the driver that we left on your hard drive.
-- Open up your browser and check to see if the YouTube videos play now. -- Mine do.
As a little side note on this. I have had to do this 4 months ago as well to get the videos to play. I am sure there is a bug in the driver but it is not being addressed or fixed by Realtek that I know of.