Some guy crossed the Atlantic in a 5'4" sailing tub...
There are lots of very nice open boats which will sail better than the one in the video. If you want a sailboat--get one which you will be comfortable in, and would not be a risk to you. This looks "tippy" as they say...
If you want a small sail boat there are a number of "project" boats which are free or almost free...but the rub is restoring them. One guy I followed got a 26 foot boat for about $500, put a few thousand more and sailed it to Tahiti...but that same year several people were lost in much larger and far better boats...so it is always a roll of the dice, if you are not fully prepared and skilled.