Thanks, another enjoyable evening. Like you I'd rather watch these than the TV.
It is possible to watch these on TV if you...
1) Have a "Smart" (Internet-enabled) television
...or...
2) Have a plug-in gadget to make your present television Internet-enabled. These can be standalone units (Chromecast, Amazon FireTV, Roku, or AppleTV and others), or integrated with peripherals, like Blu-Ray players. Most of these gadgets will upscale, so even videos uploaded to YouTube in lower resolution will look better in HD or UHD.
Viewing YouTube videos on television does make for a very "TV-like" experience compared to seeing them on a computer monitor or smartphone.
For those interested in cycle-touring videos, a rich resource is available on Vimeo, as described here:
http://thorncyclesforum.co.uk/index.php?topic=5021.0Best,
Dan.