Wow, I don't know where to begin.
If you do use the seed starting methods exactly as described in the first video, please come back and let us know the results.
As it is, I personally have not had success with just window light -- or more precisely window seedlings have been inferior. Peat pots can cause all kinds of problems when growing seedlings and after planting out, and what happens when compost is baked in the oven was covered already by rainbowgardener a whie back.
All in all, only part that I thought was somewhat usable was partly filling the seedling container with soil mix and adding more soil mix as the tomato seedling grows up, which is a method described by members here before too.
But with this method, the larger containers take up needlessly large amount of seed starting space. Tomato seeds germinate better with bottom heat, and depending on method used to supply heat, there is a limited seed starting area. So this would not be for me. Transplanting tomato seedlings is not difficult.
The bottom of the cup/container method may also create conditions for damping off and the height of the container may keep the light too far from the seedlings, though drink cups with white interior may compensate -- these were the containers used successfully by members who posted about this method if I remember correctly.
Also, after having researched a huge list of tomato varieties and their attributes, I tend to pay closer attention to individual varieties and look for ones that are worth
...I don't know if he s a member of this forum. If he is, I hope he views what I wrote as constructive