OK, I've watched the vid - 4 mins in is enough. You should manage this without too much difficulty.
The engine mount removal appears to permit engine lowering to help access. Not because it prevents belt removal. You will need a jack though - possibly two if you want the car raised also but one jack and an axle stand/block should see you through.
Not sure how much other stuff you will have to remove but you don't need access to the top of the engine as required for timing belt change. So start at the bottom via the wheel arch and take it from there.
The biggest difficulty typically on a job like this is having the correct tools compatible with access. Typical is eg, a 5'' extension on a ratchet not quite reaching, adding another to it and there's no room. In that type of scenario a broad selection of tools and ingenuity is required eg, gain an inch by using a UJ - and/or find a 3/8 drive socket that fits and use a mixture of extensions and adaptors from both 3/8 and 1/4'' drives. You can never really know what's required until you get there.
Don't let removing the engine mount deter you though. It appears to be one of the easier elements of the job.
