Ben, are you an American playing in England or are you British. Not that it matters in the end, but I am going to give an example of a German player who came to the states and successfully made it into college ball. Depending on your situation it maybe helpful to you.
My sons sophomore year in HS a player transferred in from Germany. He was a pitcher. Its tough to compare skill levels to what I have seen on your videos, but he was big and athletic. Similar to what I saw in your videos. His skills were unrefined and raw, similar to yours. He was considered one of the better youth players in Germany at his age level. His mother is an American and his dad is German. He started playing with a number of kids from the military bases in Germany. At some point during this time he was seen by someone with good baseball knowledge. After realizing the kid had a desire to play professional baseball he suggested they come to the states and let the kid attend HS there.
The kid transferred into my kids HS. His mother had attended school there and still had family in the area. This provided her and her son a place to live while he attended HS in the states. After a few weeks of playing with the American kids he realized that he was behind in both his knowledge of the game as well as skill refinement. However, he was able to make up for it with his athleticism. Between his athleticism, a coach who understood his situation and his work ethic he was able to secure a place on the HS team. Early on he was used as a relief pitcher. He continued to work on his game and by his Junior year he became a starting pitcher. If I remember correctly he was 3rd or 4th in the rotation.
As he progressed and continued to work he started to attend showcases. He was noticed by D1 schools, but many of them mentioned to him that he still had development needed to ensure his skill levels were at the D1 mid-sized school level. A few of them had suggested Juco to him and suggested him to some Juco's. In the end he committed to a Juco where he is currently playing. I have not heard much about where he stands, but the little that I have heard indicates that he is doing well and will most likely end up playing baseball at a 4 year university.
Im not sure if getting to the states to play HS baseball is an option for you. Or even how long you have until you graduate from HS. But if it is possible its a path to consider. If not you may consider a gap year and try to hook up with an organization here where you can play baseball with the intention of getting in front of the college guys while you are playing.