Ok, I do find the vids from Earspasm Music entertaining and informative, but this particular video is just plain odd!
He soaks a wooden barrel for over half a year and then cuts it in half to see how much oil has been "absorbed". Comments are typical youtube funnyish.
https://www.youtube.com/watch?v=8fmr1VcIFD4
A few years ago, American Science and Surplus was selling what they called black wood tubes. I picked up a rough cut bell. Since I had bit of spare time I decided to put oiling to the test.
1. Went out to the band saw and cut 3 rings from the top of the bell. If you watch the video, at around the 4 minute mark they are cutting the barrel and you see a puff of smoke. That's the blade heated to the point of scorching the wood. This stuff is seriously hard.
2. Took before picture. 17 year old digital camera, and not that great of one even then. See first picture.
3. Using grape seed oil (inexpensive and plentiful) I swabbed 1 inside and out, gave one a bath soaking in a canning jar, and the third I gave a bath in a canning jar and vacuum sealed the jar (used my wife's food saver vacuum sealer). The 2 in the bath I let be and the first one got swabbed every few hours as it seemed to dry. 13 times in about 40 hours.
4. Took them out, dried them and instead of scorching them on the band saw again, I snapped them in half. Just staring at them it was hard to tell if it really did anything. So I grabbed the bell and back to the band saw. Cut another ring and snapped it in half for comparison.
5. Pictures 2-swabbed, 3-bath and 4-vacuum, were taken with an iPhone, and on it's own, slightly overexposed. The oiled halves are top and bottom, un-oiled in the middle.
Oiling most definitely penetrates into the wood.